touch screen 1, Portable, Finger touch ; 2, Fits 40-85'' Whiteboard; 3, Multi Writing; 4, CE, ... /wall/LCD Panel or operate computer. It can also work with any non-transparent object. 2, Support multi touch: two or more ... , Support Automatic Calibration: Automatic calibrations within 5 seconds, easy to operate, achieve high accuracy calibration. 4, Support Remote Control (Option): use ...