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Various lamps camera system with back marked cards
There are many kinds of lamps can be used in camera system, and those lamp camera can be used for seeing corresponding back marked cards and one to one marked cards. After you put marked cards under lamp camera, it will monitor all marks on the back of cards. Those marks can not be read by naked eyes and can not be checked by other camera or filters. The HD camera lens is hidden into lamps. The appearance is not different from normal lamps. So no one will find any leak. At the same time, the data is transmitted by wireless transfer or wifi transfer.
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