We have installed a poker camera lens inside a charger, which can be hidden in a place where is difficult for other people to find and at the same time. It can be play a great role in poker cheat by scanning barcode marked cards and then ..
Bicycle paper cards was produced in USA.Guangzhou DuoDuoXun Electronics Co., Ltd. marked it with invisible ink. So people can see the marking on backside of marked cards when they wearing contact lenses.And we can Providing custom services. ..