CCTV controller: 1.Control matrix, DVR, PTZ camera 2.3-D,Backlit keys ... used for system control and programming. It can control DVR,Matrix,speed dome camera with one keyboard.The DS ... user-friendly tactile-feel control keys. Features:Control matrix, DVR, and PTZ products with one keyboard.Backlit keys and ... key toggle for switching Matrix,PTZ and DVR.Buzzer effect and backlight .Password protection. PTZ ...