diff --git a/chuni-hands/Config.cs b/chuni-hands/Config.cs
index 1bd1fcc..8e45d49 100644
--- a/chuni-hands/Config.cs
+++ b/chuni-hands/Config.cs
@@ -13,12 +13,13 @@ namespace chuni_hands {
         public double Threshold { get; set; } = 10;
         public int Distance { get; set; } = 40;
 
+        public int CameraId { get; set; } = 0;
         public int BootstrapSeconds { get; set; } = 2;
         public int CaptureWidth { get; set; } = 640;
         public int CaptureHeight { get; set; } = 480;
         public int Fps { get; set; } = 60;
         public bool LogDiff { get; set; }
-        public string SendKeyMode { get; set; } = "be";
+        public string SendKeyMode { get; set; } = "chuni_io";
         public string EndPoint { get; set; } = "http://10.233.3.22:4420/update_air";
         public bool ShowVideo { get; set; } = true;
 
diff --git a/chuni-hands/MainWindow.xaml.cs b/chuni-hands/MainWindow.xaml.cs
index 7b7e45d..a52994a 100644
--- a/chuni-hands/MainWindow.xaml.cs
+++ b/chuni-hands/MainWindow.xaml.cs
@@ -97,7 +97,7 @@ namespace chuni_hands {
         }
 
         private void Window_Loaded(object sender, RoutedEventArgs e) {
-            var cap = new VideoCapture();
+            var cap = new VideoCapture(_config.CameraId);
             cap.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameWidth, _config.CaptureWidth);
             cap.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight, _config.CaptureHeight);
             cap.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.Autofocus, 0);