Adopts advanced infrared induction technology, surrounded by a pair of LED transmitter and LED receiver, signal strength of transmitter and position calculation of receiver, recognize the touch position of pens, fingers of any opaque object and then perform to work, any object can operate, outstanding durability and aging resistance ensure long work life operating, slight damage on the surface, support multi touch, compatible with window 7 / windows 8 and windows 10 operating system, support standard HID technology.