... is the basic component of the OTP.Structural parts for assembly positioning, dust and water, so that the entire product ... resistance to light interference.4.Product composition is simple, easy assembly, maintenance easy; Users can purchase product suite (camera module, ... the touch area, self-assembly, commissioning ;5, support WIN7 / 8, Android2.3.6/4.0 7. Seven, structure size OTP Optical touch screen ...