... Screen 1. drag, draw-line, rotate, zoom in/out 2.Withstands severe environments 3.Stable, no-drift etc. ETWOTOUCH 2 points 40 inch ... --High anti-light--Linking several multitouch screen together is available--Shape customization is available(like round,polygon)--Support TUIO,WINDOWS multitouch ... :windows 7,vista,XP,Mac OS,Linux 2/Dual points 40 inch IR multi touch screen overlay kit Size(32"-200"),Max ...