diff --git a/HardwareAccountingClient.pro b/HardwareAccountingClient.pro
index 32c3dd8..d6fbd19 100644
--- a/HardwareAccountingClient.pro
+++ b/HardwareAccountingClient.pro
@@ -21,7 +21,6 @@ SOURCES += \
     models/filterparams.cpp \
     models/location.cpp \
     models/manufacturer.cpp \
-    presenter.cpp \
     utils/buttonhoverwatcher.cpp
 
 HEADERS += \
@@ -37,7 +36,6 @@ HEADERS += \
     models/location.h \
     models/manufacturer.h \
     models/types.h \
-    presenter.h \
     utils/buttonhoverwatcher.h
 
 FORMS += \
diff --git a/apiclient.cpp b/apiclient.cpp
index 11e2582..9aa1e22 100644
--- a/apiclient.cpp
+++ b/apiclient.cpp
@@ -1,7 +1,7 @@
 #include "apiclient.h"
 
 ApiClient::ApiClient(QObject *parent)
-    : QObject{parent}, networkManager(new QNetworkAccessManager(this))
+    : QObject{parent}, _networkManager(new QNetworkAccessManager(this))
 {}
 
 void ApiClient::getFilteredDevices(bool isWorking, double priceFrom, double priceTo, bool applyFilters, bool disregardState, int entityId, int currentEntity,
@@ -19,7 +19,7 @@ void ApiClient::getFilteredDevices(bool isWorking, double priceFrom, double pric
                       .arg(sortOrder);
 
     QNetworkRequest request(baseUrl + url);
-    QNetworkReply *reply = networkManager->get(request);
+    QNetworkReply *reply = _networkManager->get(request);
 
     connect(reply, &QNetworkReply::finished, this, [this, reply]() {
         parseData(reply);
@@ -30,7 +30,7 @@ void ApiClient::getFilteredDevices(bool isWorking, double priceFrom, double pric
 void ApiClient::getEntities(const QString &url)
 {
     QNetworkRequest request(baseUrl + url);
-    QNetworkReply *reply = networkManager->get(request);
+    QNetworkReply *reply = _networkManager->get(request);
     connect(reply, &QNetworkReply::finished, this, [this, reply]() {
         parseData(reply);
     });
@@ -46,7 +46,7 @@ void ApiClient::updateDevice(int id, const Device &device)
     QJsonDocument doc(device.toJson());
     QByteArray data = doc.toJson();
 
-    QNetworkReply *reply = networkManager->put(request, data);
+    QNetworkReply *reply = _networkManager->put(request, data);
     connect(reply, &QNetworkReply::finished, this, [this, reply]() {
         handleDeviceUpdated(reply);
     });
@@ -98,7 +98,7 @@ void ApiClient::handleDeviceUpdated(QNetworkReply *reply)
 
 void ApiClient::handleError(QNetworkReply::NetworkError error)
 {
-    qWarning() << "Network error:" << error;
+    qDebug() << "Ошибка во время запроса: " << error;
 }
 
 Device ApiClient::deserializeDevice(const QJsonObject &json)
diff --git a/apiclient.h b/apiclient.h
index a6b630f..ebebe44 100644
--- a/apiclient.h
+++ b/apiclient.h
@@ -10,6 +10,7 @@
 class ApiClient : public QObject
 {
     Q_OBJECT
+
 public:
     explicit ApiClient(QObject *parent = nullptr);
 
@@ -28,19 +29,20 @@ signals:
     void devicesReceived(const QList<Device> &devices);
     void deviceUpdated(bool success);
 
+private:
+    template <typename T>
+    QMap<int, T> deserializeEntities(const QByteArray &data, const QString &itemsKey);
+    Device deserializeDevice(const QJsonObject &json);
+
 private slots:
     void parseData(QNetworkReply *reply);
     void handleDeviceUpdated(QNetworkReply *reply);
     void handleError(QNetworkReply::NetworkError error);
 
 private:
-    QNetworkAccessManager *networkManager;
-
     const QString baseUrl = "http://localhost:8080";
 
-    template <typename T>
-    QMap<int, T> deserializeEntities(const QByteArray &data, const QString &itemsKey);
-    Device deserializeDevice(const QJsonObject &json);
+    QNetworkAccessManager *_networkManager;
 };
 
 template<typename T>
diff --git a/main.cpp b/main.cpp
index 5ea4a48..ae640a0 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,11 +1,18 @@
-#include "presenter.h"
 #include <QApplication>
 
+#include "mainwindow.h"
+#include "apiclient.h"
+
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
 
-    new Presenter();
+    ApiClient* client = new ApiClient();
+    MainWindow* window = new MainWindow();
+
+    window->setClient(client);
+
+    window->show();
 
     return a.exec();
 }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 7da3d5e..6a05fad 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -16,26 +16,6 @@ MainWindow::MainWindow(QWidget *parent)
     int screenHeight = screen->geometry().height();
     setGeometry((screenWidth/2)-(width/2), (screenHeight/2)-(height/2), width, height);
 
-    returnToDeviceList();
-
-    ui->tableWidget->verticalHeader()->setVisible(false);
-    ui->tableWidget->setColumnCount(2);
-    QStringList headers = QString("ID, Название").split(',');
-    ui->tableWidget->setHorizontalHeaderLabels(headers);
-    QHeaderView *header = ui->tableWidget->horizontalHeader();
-    header->setSectionResizeMode(0, QHeaderView::Stretch);
-    header->setSectionResizeMode(1, QHeaderView::Stretch);
-    QFont headerFont = header->font();
-    headerFont.setBold(true);
-    header->setFont(headerFont);
-    ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
-    ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
-
-    ui->listWidgetDevices->setSpacing(10);
-
-    ui->checkBoxIsWorking->setAttribute(Qt::WA_TransparentForMouseEvents);
-    ui->checkBoxIsWorking->setFocusPolicy(Qt::NoFocus);
-
     QStringList filterItems = {
         "Все устройства",
         "Типы устройств",
@@ -44,7 +24,6 @@ MainWindow::MainWindow(QWidget *parent)
         "Производители",
         "Модели устройств"
     };
-
     ui->comboBoxFilters->addItems(filterItems);
 
     QStringList sortItems = {
@@ -54,24 +33,32 @@ MainWindow::MainWindow(QWidget *parent)
         "Сначала дорогие",
         "Сначала с лайком"
     };
-
     ui->comboBoxSort->addItems(sortItems);
 
+    ui->tableWidget->verticalHeader()->setVisible(false);
+    ui->tableWidget->setColumnCount(2);
+    QStringList headers = {"ID", "Название"};
+    ui->tableWidget->setHorizontalHeaderLabels(headers);
+    QHeaderView *header = ui->tableWidget->horizontalHeader();
+    QFont headerFont = header->font();
+    headerFont.setBold(true);
+    header->setFont(headerFont);
+    header->setSectionResizeMode(QHeaderView::Stretch);
+
+    ui->listWidgetDevices->setSpacing(10);
+
     QLineEdit *searchEdit = ui->lineEditSearch;
     QPushButton *searchButton = new QPushButton(this);
-
     ButtonHoverWatcher *watcher = new ButtonHoverWatcher(this);
     searchButton->installEventFilter(watcher);
     searchButton->setCursor(Qt::PointingHandCursor);
     searchButton->setStyleSheet("background: transparent; border: none;");
     searchButton->setIcon(QIcon(":/images/search.png"));
     searchButton->setFixedSize(22, 22);
-
     QMargins margins = searchEdit->textMargins();
     searchEdit->setTextMargins(margins.left(), margins.top(), searchButton->width(), margins.bottom());
     searchEdit->setPlaceholderText(QStringLiteral("Поиск устройств по модели, типу или серийному номеру..."));
     searchEdit->setMaxLength(200);
-
     QHBoxLayout *searchLayout = new QHBoxLayout();
     searchLayout->addStretch();
     searchLayout->addWidget(searchButton);
@@ -85,6 +72,18 @@ MainWindow::MainWindow(QWidget *parent)
     buttonGroup->addButton(ui->radioButtonDisregard);
     ui->radioButtonWorking->setChecked(true);
 
+    ui->checkBoxIsWorking->setAttribute(Qt::WA_TransparentForMouseEvents);
+    ui->checkBoxIsWorking->setFocusPolicy(Qt::NoFocus);
+
+    ui->pushButtonDisregardPrice->setToolTip("Цена не учитывается при том условии, если оба значения из диапазона равны нулю");
+
+    QFile *styleFile = new QFile(":/styles.qss");
+    if (styleFile->open(QFile::ReadOnly)) {
+        QTextStream ts(styleFile);
+        QString style = ts.readAll();
+        qApp->setStyleSheet(style);
+    }
+
     connect(ui->comboBoxFilters, SIGNAL(activated(int)), this, SLOT(updateTableWidget(int)));
     connect(ui->comboBoxSort, SIGNAL(activated(int)), this, SLOT(changeSortOrder()));
     connect(ui->tableWidget->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)), this, SLOT(updateListWidget()));
@@ -93,18 +92,14 @@ MainWindow::MainWindow(QWidget *parent)
     connect(ui->pushButtonClear, SIGNAL(clicked()), this, SLOT(pushButtonClearClicked()));
     connect(searchEdit, SIGNAL(returnPressed()), this, SLOT(pushButtonSearchClicked()));
     connect(searchButton, SIGNAL(clicked()), this, SLOT(pushButtonSearchClicked()));
+    connect(ui->pushButtonDisregardPrice, SIGNAL(clicked()), this, SLOT(pushButtonDisregardPriceClicked()));
     connect(ui->pushButtonApplyFilters, SIGNAL(clicked()), this, SLOT(pushButtonApplyFiltersClicked()));
     connect(ui->pushButtonCancelFilters, SIGNAL(clicked()), this, SLOT(pushButtonCancelFiltersClicked()));
     connect(ui->pushButtonDefault, SIGNAL(clicked()), this, SLOT(pushButtonDefaultClicked()));
     connect(ui->pushButtonStructure, SIGNAL(clicked()), this, SLOT(pushButtonStructureClicked()));
     connect(ui->pushButtonCharacteristics, SIGNAL(clicked()), this, SLOT(pushButtonCharacteristicsClicked()));
 
-    QFile *styleFile = new QFile(":/styles.qss");
-    if (styleFile->open(QFile::ReadOnly)) {
-        QTextStream ts(styleFile);
-        QString style = ts.readAll();
-        qApp->setStyleSheet(style);
-    }
+    returnToDeviceList();
 }
 
 MainWindow::~MainWindow()
@@ -122,22 +117,22 @@ void MainWindow::updateTableWidget(int index)
     switch (index) {
     case 0: // Все устройства
         clearDevicesOutputSettings();
-        updateListWidgetDevices(0);
+        updateDevices(-1);
         break;
     case 1: // Типы устройств
-        fillTable<DeviceType>(mapDeviceTypes);
+        _client->getEntities("/api/devicetypes");
         break;
     case 2: // Помещения
-        fillTable<Location>(mapLocations);
+        _client->getEntities("/api/locations");
         break;
     case 3: // Отделы
-        fillTable<Department>(mapDepartments);
+        _client->getEntities("/api/departments");
         break;
     case 4: // Производители
-        fillTable<Manufacturer>(mapManufacturers);
+        _client->getEntities("/api/manufacturers");
         break;
     case 5: // Модели устройств
-        fillTable<DeviceModel>(mapDeviceModels);
+        _client->getEntities("/api/devicemodels");
         break;
     default:
         break;
@@ -148,13 +143,46 @@ void MainWindow::updateListWidget()
 {
     returnToDeviceList();
 
-    int selectedEntityId = getSelectedIndex();
+    int selectedElementId = getSelectedElementId();
 
-    if (selectedEntityId == -1)
+    if (selectedElementId == -1)
         return;
 
     clearDevicesOutputSettings();
-    updateListWidgetDevices(selectedEntityId);
+    updateDevices(selectedElementId);
+}
+
+void MainWindow::changeSortOrder()
+{
+    updateDevices(getSelectedElementId());
+}
+
+void MainWindow::updateDevices(int entityId)
+{
+    _client->getFilteredDevices(
+        _filterParams.isWorking(),
+        _filterParams.priceFrom(),
+        _filterParams.priceTo(),
+        _filterParams.apllyFilters(),
+        _filterParams.disregardState(),
+        entityId,
+        ui->comboBoxFilters->currentIndex(),
+        _searchInfo,
+        ui->comboBoxSort->currentText()
+    );
+}
+
+int MainWindow::getSelectedElementId()
+{
+    QModelIndexList selectedIndexes = ui->tableWidget->selectionModel()->selectedRows();
+
+    if (selectedIndexes.isEmpty()) {
+        return -1;
+    }
+
+    int rowIndex = selectedIndexes.first().row();
+
+    return ui->tableWidget->item(rowIndex, 0)->text().toInt();
 }
 
 template <typename T>
@@ -180,19 +208,43 @@ void MainWindow::fillTable(const QMap<int, T> &map)
     }
 }
 
-void MainWindow::updateListWidgetDevices(int entityId)
+void MainWindow::fillListWidget(const QList<Device> &devices)
 {
-    client->getFilteredDevices(
-        filterParams.isWorking(),
-        filterParams.priceFrom(),
-        filterParams.priceTo(),
-        filterParams.getApllyFilters(),
-        filterParams.getDisregardState(),
-        entityId,
-        ui->comboBoxFilters->currentIndex(),
-        searchInfo,
-        ui->comboBoxSort->currentText()
-    );
+    ui->listWidgetDevices->clear();
+
+    if (devices.isEmpty()) {
+        addMessageEmptyToList();
+    } else {
+        for (const auto &device : devices) {
+            addDeviceToList(device);
+        }
+    }
+}
+
+void MainWindow::addMessageEmptyToList()
+{
+    QListWidgetItem *item = new QListWidgetItem(ui->listWidgetDevices);
+    ui->listWidgetDevices->addItem(item);
+
+    QWidget *cardWidget = createMessageEmptyCard();
+
+    item->setSizeHint(cardWidget->minimumSizeHint());
+    item->setFlags(item->flags() & ~Qt::ItemIsEnabled);
+
+    ui->listWidgetDevices->setItemWidget(item, cardWidget);
+}
+
+void MainWindow::addDeviceToList(const Device &device)
+{
+    QListWidgetItem *item = new QListWidgetItem(ui->listWidgetDevices);
+    ui->listWidgetDevices->addItem(item);
+
+    QWidget *cardWidget = createDeviceCard(device);
+
+    item->setSizeHint(cardWidget->minimumSizeHint());
+    ui->listWidgetDevices->setItemWidget(item, cardWidget);
+
+    item->setData(Qt::UserRole, device.id());
 }
 
 QWidget *MainWindow::createMessageEmptyCard()
@@ -231,7 +283,7 @@ QWidget *MainWindow::createDeviceCard(const Device &device)
     QHBoxLayout *iconTextlayout = new QHBoxLayout();
 
     QLabel *imageLabel = new QLabel(cardWidget);
-    QString imagePath = deviceTypeImages[device.deviceModel().idType()];
+    QString imagePath = _deviceTypeImages[device.deviceModel().idType()];
     QPixmap pixmap(imagePath);
     imageLabel->setPixmap(pixmap.scaled(100, 100, Qt::KeepAspectRatio));
 
@@ -242,20 +294,20 @@ QWidget *MainWindow::createDeviceCard(const Device &device)
     QLabel *serialNumberLabel = new QLabel(device.serialNumber(), cardWidget);
     QFont serialNumberFont("Arial", 14, QFont::Bold);
     serialNumberLabel->setFont(serialNumberFont);
+
     textLayout->addWidget(serialNumberLabel);
 
     QFont generalFont("Arial", 11);
 
-    QString typeName = device.deviceModel().nameType();
-    typeName = typeName.left(typeName.length() - 1);
-    if (typeName == "Персональные компьютер")
-        typeName = "Персональный компьютер";
+    QString typeName = normalizeTypeName(device.deviceModel().nameType());
     QLabel *typeNameLabel = new QLabel(typeName + ": " + device.deviceModel().name(), cardWidget);
     typeNameLabel->setFont(generalFont);
+
     textLayout->addWidget(typeNameLabel);
 
     QLabel *statusLabel = new QLabel(device.isWorking() ? "Работает" : "Сломано", cardWidget);
     statusLabel->setFont(generalFont);
+
     textLayout->addWidget(statusLabel);
 
     QHBoxLayout *priceLikeLayout = new QHBoxLayout();
@@ -264,6 +316,7 @@ QWidget *MainWindow::createDeviceCard(const Device &device)
     QLabel *priceLabel = new QLabel(QString::number(device.price()) + " ₽", cardWidget);
     priceLabel->setFont(generalFont);
     priceLabel->setFixedWidth(100);
+
     priceLikeLayout->addWidget(priceLabel);
 
     priceLikeLayout->addSpacerItem(new QSpacerItem(40, 0, QSizePolicy::Expanding, QSizePolicy::Minimum));
@@ -272,20 +325,19 @@ QWidget *MainWindow::createDeviceCard(const Device &device)
     likeCheckBox->setChecked(device.isLiked());
     likeCheckBox->setFont(generalFont);
     likeCheckBox->setStyleSheet(likeCheckBox->isChecked() ? "color: green;" : "color: black;");
-
     connect(likeCheckBox, &QCheckBox::toggled, this, [this, device, likeCheckBox](bool checked) {
-        Device updDevice = device;
-        updDevice.setIsLiked(checked);
-        client->updateDevice(updDevice.id(), updDevice);
+        Device updatedDevice = device;
+        updatedDevice.setIsLiked(checked);
+        _client->updateDevice(updatedDevice.id(), updatedDevice);
 
-        connect(client, &ApiClient::deviceUpdated, this, [this, checked, device, likeCheckBox](bool success) {
-            disconnect(client, &ApiClient::deviceUpdated, this, nullptr);
+        connect(_client, &ApiClient::deviceUpdated, this, [this, checked, device, likeCheckBox](bool success) {
+            disconnect(_client, &ApiClient::deviceUpdated, this, nullptr);
 
             if (success) {
                 QString message = checked ? "Устройство добавлено в избранное." : "Устройство удалено из избранного.";
                 QMessageBox::information(this, "Обновление", message);
 
-                Device& deviceRef = mapDevices[device.id()];
+                Device& deviceRef = _mapDevices[device.id()];
                 deviceRef.setIsLiked(checked);
 
                 likeCheckBox->setStyleSheet(checked ? "color: green;" : "color: black;");
@@ -314,23 +366,12 @@ QWidget *MainWindow::createDeviceCard(const Device &device)
     return cardWidget;
 }
 
-void MainWindow::addDeviceToList(const Device &device)
+QString MainWindow::normalizeTypeName(const QString &name)
 {
-    QListWidgetItem *item = new QListWidgetItem(ui->listWidgetDevices);
-    ui->listWidgetDevices->addItem(item);
-
-    QWidget *cardWidget = createDeviceCard(device);
-
-    item->setSizeHint(cardWidget->minimumSizeHint());
-    ui->listWidgetDevices->setItemWidget(item, cardWidget);
-
-    item->setData(Qt::UserRole, device.id());
-}
-
-void MainWindow::returnToDeviceList()
-{
-    idCard = 0;
-    ui->stackedWidget->setCurrentIndex(0);
+    QString typeName = name.left(name.length() - 1);
+    if (typeName == "Персональные компьютер")
+        typeName = "Персональный компьютер";
+    return typeName;
 }
 
 void MainWindow::showItemInfo(QListWidgetItem *item)
@@ -338,10 +379,12 @@ void MainWindow::showItemInfo(QListWidgetItem *item)
     if (!item)
         return;
 
-    int deviceId = item->data(Qt::UserRole).toInt();
-    Device device = mapDevices[deviceId];
+    ui->listWidgetDevices->scrollToItem(item, QAbstractItemView::PositionAtCenter);
 
-    idCard = deviceId;
+    int deviceId = item->data(Qt::UserRole).toInt();
+    Device device = _mapDevices[deviceId];
+
+    _idCard = deviceId;
 
     ui->lineEditId->setText(QString::number(device.id()));
     ui->lineEditSerialNum->setText(device.serialNumber());
@@ -360,6 +403,12 @@ void MainWindow::showItemInfo(QListWidgetItem *item)
     ui->stackedWidget->setCurrentIndex(1);
 }
 
+void MainWindow::returnToDeviceList()
+{
+    _idCard = 0;
+    ui->stackedWidget->setCurrentIndex(0);
+}
+
 void MainWindow::showTableWithStructureElements(const QList<DeviceStructureElement> &elements)
 {
     QDialog* dialog = new QDialog(this);
@@ -460,41 +509,6 @@ void MainWindow::showTableWithDeviceModelCharacteristics(const DeviceModel &mode
     dialog->exec();
 }
 
-void MainWindow::clearFilters()
-{
-    ui->radioButtonWorking->setChecked(true);
-    ui->doubleSpinBoxFrom->setValue(0.00);
-    ui->doubleSpinBoxTo->setValue(0.00);
-    filterParams.setIsWorking(true);
-    filterParams.setPriceFrom(-1);
-    filterParams.setPriceTo(-1);
-    filterParams.setDisregardState(false);
-    filterParams.setApllyFilters(false);
-}
-
-void MainWindow::clearDevicesOutputSettings()
-{
-    ui->comboBoxSort->setCurrentIndex(0);
-
-    ui->lineEditSearch->setText("");
-    searchInfo = "";
-
-    clearFilters();
-}
-
-int MainWindow::getSelectedIndex()
-{
-    QModelIndexList selectedIndexes = ui->tableWidget->selectionModel()->selectedRows();
-
-    if (selectedIndexes.isEmpty()) {
-        return -1;
-    }
-
-    int rowIndex = selectedIndexes.first().row();
-
-    return ui->tableWidget->item(rowIndex, 0)->text().toInt();
-}
-
 void MainWindow::pushButtonBackClicked()
 {
     returnToDeviceList();
@@ -505,21 +519,21 @@ void MainWindow::pushButtonClearClicked()
     ui->lineEditSearch->setText("");
 }
 
-void MainWindow::changeSortOrder()
-{
-    updateListWidgetDevices(getSelectedIndex());
-}
-
 void MainWindow::pushButtonSearchClicked()
 {
-    searchInfo = ui->lineEditSearch->text();
-    if (searchInfo.isEmpty()) {
+    _searchInfo = ui->lineEditSearch->text();
+    if (_searchInfo.isEmpty()) {
         QMessageBox::warning(this, "Ошибка", "Пожалуйста, введите текст для поиска.");
         return;
     }
     ui->comboBoxSort->setCurrentIndex(0);
     clearFilters();
-    updateListWidgetDevices(getSelectedIndex());
+    updateDevices(getSelectedElementId());
+}
+
+void MainWindow::pushButtonDisregardPriceClicked()
+{
+    clearSpinBoxes();
 }
 
 void MainWindow::pushButtonApplyFiltersClicked()
@@ -528,113 +542,139 @@ void MainWindow::pushButtonApplyFiltersClicked()
     double priceTo = ui->doubleSpinBoxTo->value();
     if (priceFrom > priceTo) {
         QMessageBox::warning(this, "Ошибка", "Начальное значение диапазона не может быть больше конечного значения.");
-
-        ui->doubleSpinBoxFrom->setValue(filterParams.priceFrom());
-        ui->doubleSpinBoxTo->setValue(filterParams.priceTo());
-
+        clearSpinBoxes();
         return;
     }
 
-    filterParams.setApllyFilters(true);
-    filterParams.setDisregardState(ui->radioButtonDisregard->isChecked());
-    filterParams.setIsWorking(ui->radioButtonWorking->isChecked());
+    _filterParams.setApllyFilters(true);
+    _filterParams.setDisregardState(ui->radioButtonDisregard->isChecked());
+    _filterParams.setIsWorking(ui->radioButtonWorking->isChecked());
 
     if (priceFrom == 0.00 && priceTo == 0.00) {
-        filterParams.setPriceFrom(0.00);
-        filterParams.setPriceTo(std::numeric_limits<double>::max());
+        _filterParams.setPriceFrom(0.00);
+        _filterParams.setPriceTo(std::numeric_limits<double>::max());
     } else {
-        filterParams.setPriceFrom(priceFrom);
-        filterParams.setPriceTo(priceTo);
+        _filterParams.setPriceFrom(priceFrom);
+        _filterParams.setPriceTo(priceTo);
     }
 
-    updateListWidgetDevices(getSelectedIndex());
+    updateDevices(getSelectedElementId());
 }
 
 void MainWindow::pushButtonCancelFiltersClicked()
 {
     clearFilters();
-    updateListWidgetDevices(getSelectedIndex());
+    updateDevices(getSelectedElementId());
 }
 
 void MainWindow::pushButtonStructureClicked()
 {
-    showTableWithStructureElements(mapDevices[idCard].deviceModel().structureElements());
+    showTableWithStructureElements(_mapDevices[_idCard].deviceModel().structureElements());
 }
 
 void MainWindow::pushButtonCharacteristicsClicked()
 {
-    showTableWithDeviceModelCharacteristics(mapDevices[idCard].deviceModel());
+    showTableWithDeviceModelCharacteristics(_mapDevices[_idCard].deviceModel());
 }
 
 void MainWindow::pushButtonDefaultClicked()
 {
     clearDevicesOutputSettings();
-    updateListWidgetDevices(getSelectedIndex());
+    updateDevices(getSelectedElementId());
 }
 
-QMap<int, DeviceModel> MainWindow::getMapDeviceModels() const
+void MainWindow::clearDevicesOutputSettings()
 {
-    return mapDeviceModels;
+    ui->comboBoxSort->setCurrentIndex(0);
+
+    ui->lineEditSearch->setText("");
+    _searchInfo = "";
+
+    clearFilters();
 }
 
-void MainWindow::setMapDevices(const QMap<int, Device> &newMapDevices)
+void MainWindow::clearFilters()
 {
-    mapDevices = newMapDevices;
-    updateTableWidget(0);
-    connect(client, &ApiClient::devicesReceived, this, [this](const QList<Device> &filteredDevices) {
-        ui->listWidgetDevices->clear();
-        if (filteredDevices.isEmpty()) {
-            QListWidgetItem *item = new QListWidgetItem(ui->listWidgetDevices);
-            ui->listWidgetDevices->addItem(item);
-            QWidget *cardWidget = createMessageEmptyCard();
-            item->setSizeHint(cardWidget->minimumSizeHint());
-            item->setFlags(item->flags() & ~Qt::ItemIsEnabled);
-            ui->listWidgetDevices->setItemWidget(item, cardWidget);
-        } else {
-            for (const auto &device : filteredDevices) {
-                int deviceModelId = device.deviceModel().id();
-                if (mapDeviceModels.contains(deviceModelId)) {
-                    Device updatedDevice = device;
-                    updatedDevice.setDeviceModel(mapDeviceModels[deviceModelId]);
-                    addDeviceToList(updatedDevice);
-                } else {
-                    addDeviceToList(device);
-                }
-            }
-        }
-    });
+    ui->radioButtonWorking->setChecked(true);
+    clearSpinBoxes();
+    _filterParams.setIsWorking(true);
+    _filterParams.setPriceFrom(-1);
+    _filterParams.setPriceTo(-1);
+    _filterParams.setDisregardState(false);
+    _filterParams.setApllyFilters(false);
 }
 
-void MainWindow::setMapDeviceModels(const QMap<int, DeviceModel> &newMapDeviceModels)
+void MainWindow::clearSpinBoxes()
 {
-    mapDeviceModels = newMapDeviceModels;
-}
-
-void MainWindow::setMapDeviceTypes(const QMap<int, DeviceType> &newMapDeviceTypes)
-{
-    mapDeviceTypes = newMapDeviceTypes;
-    for (int i = 1; i <= mapDeviceTypes.size(); i++) {
-        QString imagePath = QString(":/images/device-type-%1.png").arg(i);
-        deviceTypeImages[i] = imagePath;
-    }
-}
-
-void MainWindow::setMapManufacturers(const QMap<int, Manufacturer> &newMapManufacturers)
-{
-    mapManufacturers = newMapManufacturers;
-}
-
-void MainWindow::setMapDepartments(const QMap<int, Department> &newMapDepartments)
-{
-    mapDepartments = newMapDepartments;
-}
-
-void MainWindow::setMapLocations(const QMap<int, Location> &newMapLocations)
-{
-    mapLocations = newMapLocations;
+    ui->doubleSpinBoxFrom->setValue(0.00);
+    ui->doubleSpinBoxTo->setValue(0.00);
 }
 
 void MainWindow::setClient(ApiClient *newClient)
 {
-    client = newClient;
+    _client = newClient;
+    connect(_client, &ApiClient::devicesReceived, this, &MainWindow::onDevicesReceived);
+    connect(_client, &ApiClient::departmentsReceived, this, &MainWindow::onDepartmentsReceived);
+    connect(_client, &ApiClient::deviceModelsReceived, this, &MainWindow::onDeviceModelsReceived);
+    connect(_client, &ApiClient::deviceTypesReceived, this, &MainWindow::onDeviceTypesReceived);
+    connect(_client, &ApiClient::locationsReceived, this, &MainWindow::onLocationsReceived);
+    connect(_client, &ApiClient::manufacturersReceived, this, &MainWindow::onManufacturersReceived);
+    _client->getEntities("/api/devicetypes");
+    updateTableWidget(0);
+}
+
+void MainWindow::onDevicesReceived(const QList<Device> &devices)
+{
+    _mapDevices = getDevicesMap(devices);
+
+    fillListWidget(devices);
+}
+
+void MainWindow::onDepartmentsReceived(const QMap<int, Department> &departments)
+{
+    fillTable<Department>(departments);
+}
+
+void MainWindow::onDeviceModelsReceived(const QMap<int, DeviceModel> &deviceModels)
+{
+    fillTable<DeviceModel>(deviceModels);
+}
+
+void MainWindow::onDeviceTypesReceived(const QMap<int, DeviceType> &deviceTypes)
+{
+    if (_initialTypesLoad) {
+        _initialTypesLoad = false;
+    } else {
+        fillTable<DeviceType>(deviceTypes);
+    }
+    for (const DeviceType &type : deviceTypes) {
+        QString imagePath = QString(":/images/device-type-%1.png").arg(type.name());
+
+        if (QFile::exists(imagePath)) {
+            _deviceTypeImages[type.id()] = imagePath;
+        } else {
+            _deviceTypeImages[type.id()] = ":/images/placeholder.png";
+        }
+    }
+}
+
+void MainWindow::onManufacturersReceived(const QMap<int, Manufacturer> &manufacturers)
+{
+    fillTable<Manufacturer>(manufacturers);
+}
+
+void MainWindow::onLocationsReceived(const QMap<int, Location> &locations)
+{
+    fillTable<Location>(locations);
+}
+
+QMap<int, Device> MainWindow::getDevicesMap(const QList<Device> &devices)
+{
+    QMap<int, Device> devicesMap;
+
+    for (const Device &device : devices) {
+        devicesMap.insert(device.id(), device);
+    }
+
+    return devicesMap;
 }
diff --git a/mainwindow.h b/mainwindow.h
index 0ca6e52..2af1e4b 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -33,65 +33,62 @@ public:
 
     void setClient(ApiClient *newClient);
 
-    void setMapLocations(const QMap<int, Location> &newMapLocations);
-
-    void setMapDepartments(const QMap<int, Department> &newMapDepartments);
-
-    void setMapManufacturers(const QMap<int, Manufacturer> &newMapManufacturers);
-
-    void setMapDeviceTypes(const QMap<int, DeviceType> &newMapDeviceTypes);
-
-    QMap<int, DeviceModel> getMapDeviceModels() const;
-    void setMapDeviceModels(const QMap<int, DeviceModel> &newMapDeviceModels);
-
-    void setMapDevices(const QMap<int, Device> &newMapDevices);
-
 private:
     template <typename T>
     void fillTable(const QMap<int, T> &map);
-    void updateListWidgetDevices(int entityId);
+    void fillListWidget(const QList<Device> &devices);
+    void updateDevices(int entityId);
     QWidget* createMessageEmptyCard();
     QWidget* createDeviceCard(const Device &device);
+    QString normalizeTypeName(const QString &name);
+    void addMessageEmptyToList();
     void addDeviceToList(const Device &device);
     void returnToDeviceList();
     void showTableWithStructureElements(const QList<DeviceStructureElement>& elements);
     void showTableWithDeviceModelCharacteristics(const DeviceModel& model);
+    void clearSpinBoxes();
     void clearFilters();
     void clearDevicesOutputSettings();
-    int getSelectedIndex();
+    int getSelectedElementId();
+    QMap<int, Device> getDevicesMap(const QList<Device> &devices);
 
 private slots:
     void updateTableWidget(int index);
     void updateListWidget();
     void showItemInfo(QListWidgetItem*);
     void changeSortOrder();
+
     void pushButtonBackClicked();
     void pushButtonClearClicked();
     void pushButtonSearchClicked();
+    void pushButtonDisregardPriceClicked();
     void pushButtonApplyFiltersClicked();
     void pushButtonCancelFiltersClicked();
     void pushButtonStructureClicked();
     void pushButtonCharacteristicsClicked();
     void pushButtonDefaultClicked();
 
+    void onDevicesReceived(const QList<Device> &devices);
+    void onDepartmentsReceived(const QMap<int, Department> &departments);
+    void onDeviceModelsReceived(const QMap<int, DeviceModel> &deviceModels);
+    void onDeviceTypesReceived(const QMap<int, DeviceType> &deviceTypes);
+    void onManufacturersReceived(const QMap<int, Manufacturer> &manufacturers);
+    void onLocationsReceived(const QMap<int, Location> &locations);
+
 private:
     Ui::MainWindow *ui;
 
-    ApiClient *client;
+    ApiClient *_client;
 
-    QString searchInfo = "";
-    FilterParams filterParams;
+    QString _searchInfo = "";
+    FilterParams _filterParams;
 
-    int idCard = 0;
+    bool _initialTypesLoad = true;
+    int _idCard = 0;
 
-    QMap<int, QString> deviceTypeImages;
+    QMap<int, QString> _deviceTypeImages;
 
-    QMap<int, Location> mapLocations;
-    QMap<int, Department> mapDepartments;
-    QMap<int, Manufacturer> mapManufacturers;
-    QMap<int, DeviceType> mapDeviceTypes;
-    QMap<int, DeviceModel> mapDeviceModels;
-    QMap<int, Device> mapDevices;
+    QMap<int, Device> _mapDevices;
 };
 
 #endif // MAINWINDOW_H
diff --git a/mainwindow.ui b/mainwindow.ui
index 51836ab..7a7f493 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -76,7 +76,10 @@
      </font>
     </property>
     <property name="selectionMode">
-     <enum>QAbstractItemView::SelectionMode::SingleSelection</enum>
+     <enum>QAbstractItemView::SingleSelection</enum>
+    </property>
+    <property name="selectionBehavior">
+     <enum>QAbstractItemView::SelectRows</enum>
     </property>
    </widget>
    <widget class="QStackedWidget" name="stackedWidget">
@@ -124,7 +127,7 @@
        <string>Устройства</string>
       </property>
       <property name="alignment">
-       <set>Qt::AlignmentFlag::AlignCenter</set>
+       <set>Qt::AlignCenter</set>
       </property>
      </widget>
      <widget class="QListWidget" name="listWidgetDevices">
@@ -136,6 +139,9 @@
         <height>461</height>
        </rect>
       </property>
+      <property name="verticalScrollMode">
+       <enum>QAbstractItemView::ScrollPerPixel</enum>
+      </property>
      </widget>
      <widget class="QComboBox" name="comboBoxSort">
       <property name="geometry">
@@ -267,7 +273,7 @@
         <string>Фильтры</string>
        </property>
        <property name="alignment">
-        <set>Qt::AlignmentFlag::AlignCenter</set>
+        <set>Qt::AlignCenter</set>
        </property>
       </widget>
       <widget class="QLabel" name="labelWorkingState">
@@ -289,9 +295,6 @@
        <property name="text">
         <string>Состояние</string>
        </property>
-       <property name="alignment">
-        <set>Qt::AlignmentFlag::AlignLeading|Qt::AlignmentFlag::AlignLeft|Qt::AlignmentFlag::AlignVCenter</set>
-       </property>
       </widget>
       <widget class="QLabel" name="labelPrice">
        <property name="geometry">
@@ -312,9 +315,6 @@
        <property name="text">
         <string>Цена</string>
        </property>
-       <property name="alignment">
-        <set>Qt::AlignmentFlag::AlignLeading|Qt::AlignmentFlag::AlignLeft|Qt::AlignmentFlag::AlignVCenter</set>
-       </property>
       </widget>
       <widget class="QRadioButton" name="radioButtonWorking">
        <property name="geometry">
@@ -327,8 +327,8 @@
        </property>
        <property name="font">
         <font>
-         <family>Arial</family>
-         <pointsize>10</pointsize>
+         <family>Ubuntu Sans</family>
+         <pointsize>11</pointsize>
         </font>
        </property>
        <property name="text">
@@ -346,8 +346,8 @@
        </property>
        <property name="font">
         <font>
-         <family>Arial</family>
-         <pointsize>10</pointsize>
+         <family>Ubuntu Sans</family>
+         <pointsize>11</pointsize>
         </font>
        </property>
        <property name="text">
@@ -369,6 +369,9 @@
          <pointsize>10</pointsize>
         </font>
        </property>
+       <property name="suffix">
+        <string> ₽</string>
+       </property>
        <property name="decimals">
         <number>2</number>
        </property>
@@ -391,6 +394,9 @@
          <pointsize>10</pointsize>
         </font>
        </property>
+       <property name="suffix">
+        <string> ₽</string>
+       </property>
        <property name="maximum">
         <double>1000000000000000000000.000000000000000</double>
        </property>
@@ -438,16 +444,38 @@
         <rect>
          <x>120</x>
          <y>67</y>
-         <width>111</width>
+         <width>121</width>
          <height>20</height>
         </rect>
        </property>
        <property name="font">
         <font>
-         <family>Arial</family>
+         <family>Ubuntu Sans</family>
+         <pointsize>11</pointsize>
+        </font>
+       </property>
+       <property name="text">
+        <string>Не учитывать</string>
+       </property>
+      </widget>
+      <widget class="QPushButton" name="pushButtonDisregardPrice">
+       <property name="geometry">
+        <rect>
+         <x>410</x>
+         <y>166</y>
+         <width>101</width>
+         <height>24</height>
+        </rect>
+       </property>
+       <property name="font">
+        <font>
+         <family>Ubuntu Sans</family>
          <pointsize>10</pointsize>
         </font>
        </property>
+       <property name="cursor">
+        <cursorShape>PointingHandCursor</cursorShape>
+       </property>
        <property name="text">
         <string>Не учитывать</string>
        </property>
@@ -497,7 +525,7 @@
        <string>Информация об устройстве</string>
       </property>
       <property name="alignment">
-       <set>Qt::AlignmentFlag::AlignCenter</set>
+       <set>Qt::AlignCenter</set>
       </property>
      </widget>
      <widget class="QLineEdit" name="lineEditId">
@@ -955,9 +983,6 @@
       <property name="text">
        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Дополнительная информация&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
       </property>
-      <property name="alignment">
-       <set>Qt::AlignmentFlag::AlignLeading|Qt::AlignmentFlag::AlignLeft|Qt::AlignmentFlag::AlignVCenter</set>
-      </property>
      </widget>
      <widget class="QCheckBox" name="checkBoxIsWorking">
       <property name="enabled">
@@ -1078,7 +1103,7 @@
      <x>0</x>
      <y>0</y>
      <width>1136</width>
-     <height>20</height>
+     <height>22</height>
     </rect>
    </property>
   </widget>
diff --git a/models/baseentity.h b/models/baseentity.h
index beebd43..7c24ec5 100644
--- a/models/baseentity.h
+++ b/models/baseentity.h
@@ -11,7 +11,7 @@ public:
     int id() const;
     void setId(int newId);
 
-    virtual void fromJson(const QJsonObject &) {}
+    virtual void fromJson(const QJsonObject &) = 0;
     virtual QJsonObject toJson() const = 0;
 
 private:
diff --git a/models/device.cpp b/models/device.cpp
index a834707..a2d3584 100644
--- a/models/device.cpp
+++ b/models/device.cpp
@@ -164,7 +164,7 @@ void Device::fromJson(const QJsonObject &json)
     setIsLiked(json["isLiked"].toBool());
 
     DeviceModel model;
-    model.setId(json["idDeviceModel"].toInt());
+    model.fromJson(json["deviceModel"].toObject());
     setDeviceModel(model);
 }
 
@@ -184,7 +184,7 @@ QJsonObject Device::toJson() const
     obj["nameEmployee"] = nameEmployee();
     obj["idDepartment"] = idDepartment();
     obj["nameDepartment"] = nameDepartment();
-    obj["idDeviceModel"] = deviceModel().id();
+    obj["deviceModel"] = deviceModel().toJson();
     obj["isLiked"] = isLiked();
     return obj;
 }
diff --git a/models/filterparams.cpp b/models/filterparams.cpp
index 6fe84aa..9a4a83a 100644
--- a/models/filterparams.cpp
+++ b/models/filterparams.cpp
@@ -33,22 +33,22 @@ void FilterParams::setPriceTo(double newPriceTo)
     _priceTo = newPriceTo;
 }
 
-bool FilterParams::getDisregardState() const
+bool FilterParams::disregardState() const
 {
-    return disregardState;
+    return _disregardState;
 }
 
 void FilterParams::setDisregardState(bool newDisregardState)
 {
-    disregardState = newDisregardState;
+    _disregardState = newDisregardState;
 }
 
-bool FilterParams::getApllyFilters() const
+bool FilterParams::apllyFilters() const
 {
-    return apllyFilters;
+    return _apllyFilters;
 }
 
 void FilterParams::setApllyFilters(bool newApllyFilters)
 {
-    apllyFilters = newApllyFilters;
+    _apllyFilters = newApllyFilters;
 }
diff --git a/models/filterparams.h b/models/filterparams.h
index 5267e90..3ebea6e 100644
--- a/models/filterparams.h
+++ b/models/filterparams.h
@@ -15,18 +15,18 @@ public:
     double priceTo() const;
     void setPriceTo(double newPriceTo);
 
-    bool getDisregardState() const;
+    bool disregardState() const;
     void setDisregardState(bool newDisregardState);
 
-    bool getApllyFilters() const;
+    bool apllyFilters() const;
     void setApllyFilters(bool newApllyFilters);
 
 private:
     bool _isWorking = true;
     double _priceFrom = -1;
     double _priceTo = -1;
-    bool disregardState = false;
-    bool apllyFilters = false;
+    bool _disregardState = false;
+    bool _apllyFilters = false;
 };
 
 #endif // FILTERPARAMS_H
diff --git a/presenter.cpp b/presenter.cpp
deleted file mode 100644
index 6e02cd9..0000000
--- a/presenter.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-#include "presenter.h"
-
-Presenter::Presenter(QObject *parent) : QObject(parent)
-{
-    client = new ApiClient();
-    window = new MainWindow();
-
-    connect(client, &ApiClient::devicesReceived, this, &Presenter::onDevicesReceived);
-    connect(client, &ApiClient::departmentsReceived, this, &Presenter::onDepartmentsReceived);
-    connect(client, &ApiClient::deviceModelsReceived, this, &Presenter::onDeviceModelsReceived);
-    connect(client, &ApiClient::deviceTypesReceived, this, &Presenter::onDeviceTypesReceived);
-    connect(client, &ApiClient::locationsReceived, this, &Presenter::onLocationsReceived);
-    connect(client, &ApiClient::manufacturersReceived, this, &Presenter::onManufacturersReceived);
-
-    window->setClient(client);
-
-    client->getEntities("/api/locations");
-    client->getEntities("/api/departments");
-    client->getEntities("/api/manufacturers");
-    client->getEntities("/api/devicetypes");
-    client->getEntities("/api/devicemodels");
-}
-
-Presenter::~Presenter()
-{
-    client->deleteLater();
-    window->deleteLater();
-}
-
-void Presenter::onLocationsReceived(const QMap<int, Location> &locations)
-{
-    window->setMapLocations(locations);
-}
-
-void Presenter::onDepartmentsReceived(const QMap<int, Department> &departments)
-{
-    window->setMapDepartments(departments);
-}
-
-void Presenter::onManufacturersReceived(const QMap<int, Manufacturer> &manufacturers)
-{
-    window->setMapManufacturers(manufacturers);
-}
-
-void Presenter::onDeviceTypesReceived(const QMap<int, DeviceType> &deviceTypes)
-{
-    window->setMapDeviceTypes(deviceTypes);
-}
-
-void Presenter::onDeviceModelsReceived(const QMap<int, DeviceModel> &deviceModels)
-{
-    window->setMapDeviceModels(deviceModels);
-    client->getFilteredDevices(
-        false,
-        0.00,
-        std::numeric_limits<double>::max(),
-        false,
-        false,
-        -1,
-        -1,
-        "",
-        "Сначала новые"
-    );
-}
-
-void Presenter::onDevicesReceived(const QList<Device> &devices)
-{
-    disconnect(client, &ApiClient::devicesReceived, this, &Presenter::onDevicesReceived);
-
-    QMap<int, Device> devicesMap;
-    QMap<int, DeviceModel> deviceModels = window->getMapDeviceModels();
-
-    for (const Device &device : devices) {
-        int deviceModelId = device.deviceModel().id();
-
-        if (deviceModels.contains(deviceModelId)) {
-            Device updatedDevice = device;
-            updatedDevice.setDeviceModel(deviceModels[deviceModelId]);
-            devicesMap.insert(updatedDevice.id(), updatedDevice);
-        } else {
-            devicesMap.insert(device.id(), device);
-        }
-    }
-    window->setMapDevices(devicesMap);
-    window->show();
-}
diff --git a/presenter.h b/presenter.h
deleted file mode 100644
index 8cd6771..0000000
--- a/presenter.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef PRESENTER_H
-#define PRESENTER_H
-
-#include <QObject>
-
-#include "apiclient.h"
-#include "mainwindow.h"
-
-class Presenter : public QObject
-{
-    Q_OBJECT
-public:
-    Presenter(QObject *parent = nullptr);
-    ~Presenter();
-
-private slots:
-    void onDevicesReceived(const QList<Device> &devices);
-    void onDepartmentsReceived(const QMap<int, Department> &departments);
-    void onDeviceModelsReceived(const QMap<int, DeviceModel> &deviceModels);
-    void onDeviceTypesReceived(const QMap<int, DeviceType> &deviceTypes);
-    void onManufacturersReceived(const QMap<int, Manufacturer> &manufacturers);
-    void onLocationsReceived(const QMap<int, Location> &locations);
-
-private:
-    ApiClient *client;
-    MainWindow *window;
-};
-
-#endif // PRESENTER_H
diff --git a/resources/images/device-type-4.png b/resources/images/device-type-Мониторы.png
similarity index 100%
rename from resources/images/device-type-4.png
rename to resources/images/device-type-Мониторы.png
diff --git a/resources/images/device-type-3.png b/resources/images/device-type-Ноутбуки.png
similarity index 100%
rename from resources/images/device-type-3.png
rename to resources/images/device-type-Ноутбуки.png
diff --git a/resources/images/device-type-2.png b/resources/images/device-type-Персональные компьютеры.png
similarity index 100%
rename from resources/images/device-type-2.png
rename to resources/images/device-type-Персональные компьютеры.png
diff --git a/resources/images/device-type-5.png b/resources/images/device-type-Принтеры.png
similarity index 100%
rename from resources/images/device-type-5.png
rename to resources/images/device-type-Принтеры.png
diff --git a/resources/images/device-type-7.png b/resources/images/device-type-Проекторы.png
similarity index 100%
rename from resources/images/device-type-7.png
rename to resources/images/device-type-Проекторы.png
diff --git a/resources/images/device-type-6.png b/resources/images/device-type-Роутеры.png
similarity index 100%
rename from resources/images/device-type-6.png
rename to resources/images/device-type-Роутеры.png
diff --git a/resources/images/device-type-1.png b/resources/images/device-type-Сервера.png
similarity index 100%
rename from resources/images/device-type-1.png
rename to resources/images/device-type-Сервера.png
diff --git a/resources/images/device-type-8.png b/resources/images/device-type-Телефоны.png
similarity index 100%
rename from resources/images/device-type-8.png
rename to resources/images/device-type-Телефоны.png
diff --git a/resources/images/placeholder.png b/resources/images/placeholder.png
new file mode 100644
index 0000000..f0ee95e
Binary files /dev/null and b/resources/images/placeholder.png differ
diff --git a/resources/resources.qrc b/resources/resources.qrc
index b47921c..aaddfc2 100644
--- a/resources/resources.qrc
+++ b/resources/resources.qrc
@@ -16,30 +16,33 @@
     <file>images/down-arrow.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-1.png</file>
+    <file>images/device-type-Сервера.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-2.png</file>
+    <file>images/device-type-Персональные компьютеры.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-3.png</file>
+    <file>images/device-type-Ноутбуки.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-4.png</file>
+    <file>images/device-type-Мониторы.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-5.png</file>
+    <file>images/device-type-Принтеры.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-6.png</file>
+    <file>images/device-type-Роутеры.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-7.png</file>
+    <file>images/device-type-Проекторы.png</file>
   </qresource>
   <qresource>
-    <file>images/device-type-8.png</file>
+    <file>images/device-type-Телефоны.png</file>
+  </qresource>
+  <qresource>
+    <file>images/placeholder.png</file>
   </qresource>
   <qresource prefix="/">
         <file>styles.qss</file>
   </qresource>
-</RCC>
\ No newline at end of file
+</RCC>
diff --git a/resources/styles.qss b/resources/styles.qss
index 8596cec..2a86ad9 100644
--- a/resources/styles.qss
+++ b/resources/styles.qss
@@ -8,11 +8,11 @@ QComboBox, QPushButton, QLineEdit, QTextEdit, QListWidget, QTableWidget, QGroupB
 }
 
 QGroupBox#groupBoxFilters, QStackedWidget#stackedWidget {
-	background-color: white;
+    background-color: white;
 }
 
 QLineEdit {
-	border-radius: 5px;
+    border-radius: 5px;
 }
 
 QComboBox {
@@ -44,4 +44,4 @@ QPushButton:pressed {
     border-radius: 4px;
     border-width: 2px;
     color: white;
-}
\ No newline at end of file
+}
diff --git a/utils/buttonhoverwatcher.cpp b/utils/buttonhoverwatcher.cpp
index d08a508..6716860 100644
--- a/utils/buttonhoverwatcher.cpp
+++ b/utils/buttonhoverwatcher.cpp
@@ -5,7 +5,7 @@ ButtonHoverWatcher::ButtonHoverWatcher(QObject *parent) : QObject(parent)
 
 bool ButtonHoverWatcher::eventFilter(QObject *watched, QEvent *event)
 {
-    QPushButton * button = qobject_cast<QPushButton*>(watched);
+    QPushButton *button = qobject_cast<QPushButton*>(watched);
     if (!button) {
         return false;
     }
diff --git a/utils/buttonhoverwatcher.h b/utils/buttonhoverwatcher.h
index 659e8a6..0c84a62 100644
--- a/utils/buttonhoverwatcher.h
+++ b/utils/buttonhoverwatcher.h
@@ -8,6 +8,7 @@
 class ButtonHoverWatcher : public QObject
 {
     Q_OBJECT
+
 public:
     explicit ButtonHoverWatcher(QObject *parent = nullptr);
     virtual bool eventFilter(QObject * watched, QEvent * event) Q_DECL_OVERRIDE;