It is the PTZ color camera,the user can hide it behind the roof, it is very secret and hidden.Before the game,the user just need to open the hole and zoom to the sweet spot, partner can see the cards of each players in next room by TV, then he can tell the palyers what cards it is.
 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.