A Function: adjust the camera to proper area, then it can see the players' cards and transmit the photo to next room, the partner can see the cards in the TV. B range can zoom: left to right:3m up to down:3m 2.Estimate working hour: plug in external power C Configuration: It was included 1 PTZ color camera,1 wireless transmitter and receiver, 1 remote control D Advantage: 1.the maximum range for camera to move up/down,left/right is 3m 2.no need to mark the cards 3.Plug in external power, no time limitted 4.Not easy to arouse suspect.