... 15-inch to 85-inch.2. Second, the effect chart 3. Third, the basic characteristics Touch media: finger, pen and any opaque objectsUSB ... bar encircled the area, can touch; encircled the area within the light guide bar, AA outside the touch action can be set;3.OTP can ... the touch area, self-assembly, commissioning ;5, support WIN7 / 8, Android2.3.6/4.0 7. Seven, structure size OTP Optical touch screen ...