Most scanning cameras that we sell are intended for reading poker marks, while our leather belt camera is used for reading the marks we print on the back of Mahjong tiles, Domino tiles and Pai gow tiles with our special invisible ink. No other kinds of scanning cameras can be used for that purpose.
There is no need for you to worry that the camera might be found out by other players since it’s so small and completely concealable. Through the leather belt camera, you can see those marks clearly on TV or cellphone screen. The short scanning distance of the leather belt camera is 20-40cm, and the long scanning distance is 1.5m.