... invisible Infrared theory, UP-CONVERSION PHOSPHOR Anti-Stokes the product can detect item with infrared Anti-counterfeit material. 2 Application method To aim ... at the item, to press the swith continuously, when the anti-counterfeit material appear, the buzzer will make voice and the green ... , No. 8 , Dongzhou Rd , Dongjing, Songjing, Shanghai, P.R. 201619,China