... , rotate, zoom in/out 2.Withstands severe environments 3.Stable, no-drift etc. ETWOTOUCH 4 points 32 inch IR multitouch screen ... multitouch protocol.Basic parameters:--Light transmittance: 95%-100%--Touch pressure:No need pressure,touch the surface of screen is ok.--Resolution ... -16ms--Power supply mode:USB--System:windows 7,vista,XP,Mac OS,Linux 4 points 32 inch IR multitouch screen ...