Multi Touch Screen(2-32 points) 1. drag, draw-line, ... drift ETWOTOUCH USB 40 inch IR Multi Touch Screen (2 to 32 points)Screen/Panel/frame/kit/CE,FCC,RoHS ETWOTOUCH ... acoustic wave(SAW) touch screen, Infrared(IR) Touch Screen,Multi touch IR touch screen, five-resistive touch screen, touch monitor ... ETWOTOUCH USB 40 inch IR multi touch screen overlay kit (2 to 32 points)Screen/Panel/frame/kit/CE,FCC,RoHS