This product not include contact lense ， if you need ，you can contact us,

Introduction to infrared marker card

Infrared marker cards are playing cards that are marked on the back of playing cards with special infrared invisible ink. Special infrared contact ink is unrecognizable to the naked eye and can only be seen by wearing special infrared glasses or contact lense.

Similar to the principle of money detector, this special infrared invisible ink mark can be seen by using light with a wavelength different from that of visible light. Due to the characteristics of this special infrared invisible ink, infrared labeled poker looks like ordinary poker. Therefore, it is difficult to be found by others in the process of use.