... Centre and Education GroupsTang Hftouch infrared interactive whiteboard is leading the meeting and learning models of man-machine, ... and provide free upgrade. Tang Hftouch IR Touch Screen Panel Features:* Infrared technology* Water pen, finger handwrite, or any ... .* No correction, drive-free. Easy maintenance* Single-point touch, Multi-touch, hand gesture recognizable, drag, draw-line, rotate, zoom ...