diff --git a/src/HikvisionAttendanceManager.App/MainWindow.xaml b/src/HikvisionAttendanceManager.App/MainWindow.xaml
index d775a00..dfb8f5a 100644
--- a/src/HikvisionAttendanceManager.App/MainWindow.xaml
+++ b/src/HikvisionAttendanceManager.App/MainWindow.xaml
@@ -165,10 +165,10 @@
                             <TextBlock Text="Device → DB" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="DbToDeviceNav" Style="{StaticResource SidebarButton}" Click="Navigate_Click" Tag="DB → Device">
+                    <Button x:Name="DeviceToDeviceNav" Style="{StaticResource SidebarButton}" Click="Navigate_Click" Tag="Device → Device">
                         <StackPanel Orientation="Horizontal">
                             <Path Width="22" Height="22" Stretch="Uniform" Stroke="{Binding Foreground, RelativeSource={RelativeSource AncestorType=Button}}" StrokeThickness="1.8" StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round" Fill="Transparent" Margin="0,0,20,0" Data="M 11 19 V 6 M 6 11 L 11 6 L 16 11 M 4 20 H 18"/>
-                            <TextBlock Text="DB → Device" VerticalAlignment="Center"/>
+                            <TextBlock Text="Device → Device" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
                     <Button x:Name="DepartmentalSyncNav" Style="{StaticResource SidebarButton}" Click="Navigate_Click" Tag="Departmental User Sync">
@@ -383,8 +383,8 @@
             <Grid x:Name="DeviceToDbPage" Visibility="Collapsed">
                 <local:DeviceToDbView x:Name="DeviceToDbControl"/>
             </Grid>
-            <Grid x:Name="DbToDevicePage" Visibility="Collapsed">
-                <local:DbToDeviceView x:Name="DbToDeviceControl"/>
+            <Grid x:Name="DeviceToDevicePage" Visibility="Collapsed">
+                <local:DeviceToDeviceView x:Name="DeviceToDeviceControl"/>
             </Grid>
             <Grid x:Name="DepartmentalSyncPage" Visibility="Collapsed">
                 <local:DepartmentalUserSyncView x:Name="DepartmentalSyncControl"/>
diff --git a/src/HikvisionAttendanceManager.App/MainWindow.xaml.cs b/src/HikvisionAttendanceManager.App/MainWindow.xaml.cs
index 71d4f27..3df5b09 100644
--- a/src/HikvisionAttendanceManager.App/MainWindow.xaml.cs
+++ b/src/HikvisionAttendanceManager.App/MainWindow.xaml.cs
@@ -185,7 +185,7 @@ public partial class MainWindow : Window
         UserManagementPage.Visibility = page == "User Management" ? Visibility.Visible : Visibility.Collapsed;
         AttendanceSyncPage.Visibility = page == "Attendance Sync" ? Visibility.Visible : Visibility.Collapsed;
         DeviceToDbPage.Visibility = page == "Device → DB" ? Visibility.Visible : Visibility.Collapsed;
-        DbToDevicePage.Visibility = page == "DB → Device" ? Visibility.Visible : Visibility.Collapsed;
+        DeviceToDevicePage.Visibility = page == "Device → Device" ? Visibility.Visible : Visibility.Collapsed;
         DepartmentalSyncPage.Visibility = page == "Departmental User Sync" ? Visibility.Visible : Visibility.Collapsed;
         SyncHistoryPage.Visibility = page == "Sync History" ? Visibility.Visible : Visibility.Collapsed;
         PlaceholderPage.Visibility = page == "Settings" ? Visibility.Visible : Visibility.Collapsed;
@@ -198,7 +198,7 @@ public partial class MainWindow : Window
             "User Management" => UserManagementControl.InitializeAsync(),
             "Attendance Sync" => AttendanceSyncControl.InitializeAsync(),
             "Device → DB" => DeviceToDbControl.InitializeAsync(),
-            "DB → Device" => DbToDeviceControl.InitializeAsync(),
+            "Device → Device" => DeviceToDeviceControl.InitializeAsync(),
             "Departmental User Sync" => DepartmentalSyncControl.InitializeAsync(),
             "Sync History" => SyncHistoryControl.InitializeAsync(),
             "Dashboard" => Task.CompletedTask,
@@ -267,7 +267,7 @@ public partial class MainWindow : Window
         foreach (var button in new[]
         {
             DashboardNav, DevicesNav, AttendanceSyncNav, UserManagementNav, DeviceToDbNav,
-            DbToDeviceNav, DepartmentalSyncNav, SyncHistoryNav, SettingsNav
+            DeviceToDeviceNav, DepartmentalSyncNav, SyncHistoryNav, SettingsNav
         })
         {
             var isActive = string.Equals(button.Tag as string, page, StringComparison.Ordinal);