XF infrared light for backside marked cards|poker cheat|gamble cheat

A Function:
adjust the camera to the sweet spot, then it can see the backside mark of cards and transmit the photo to next room, the partner can see the cards ink in the TV.
B Specification:
distance:1.5m-2m
              2-2.5m
              2.5-3m
2.Estimate working hour: plug in external power
C Configuration:
It was included 1 light with camera,1 wireless transmitter, 1 remote control
D Advantage:
1.marked cards for this camera can not be seen by contact lenses or perspective glasses
2.Plug in external power, no time limitted
3.Scanning cards speedily and long stable transmitting
4.Not easy to arouse suspect. 
How to use:
The user just need to click the remote control to open the camera, adjust the sweet spot to focus on the cards, then after the partner see the backside ink on the cards, he will tell the player what is it,then player can decide to continue or give up the game.