... cm highSurface DurabilitySurface durability is that of glass, Mohs\' hardness rating of 7OpticalGlass:Without glass, 4mm glare, AG (anti-glare), or ... AR (anti-reflective) glass optionalLight Transmission92%GlossAntiglare surface (curved or flat): 95 ± 15 ... ApprovalsCE, FCC, RohsOperating SystemOperation System :windows 7 IR Touch Sensor Multi Touch Overlay 57''