1.CE, FCC, RoHs certification 2. supports 2 finger touch in windows7 3. waterproof, dustproof,scratchproof Infrared Touch Screen , IR touch screen panel ,IR add-on ... of touchOver 60,000,000 single point touchOperating Tem/Hum-10 - +50 20---85% RHStorage Tem/Hum-30 - +60 0--- 95 ... raysOS compatibleWindows 2000/XP/Vista, Linux,CertificationsCCC, CE, ROHS 55 inch multi touch infrared touch frame