... DurabilitySurface durability is that of glass, Vickers-hardness 5.0 – 7.0 GN/m2Optical Light TransmissionUp to 100% (no glass), AR ... Agency ApprovalsCE,FCC Class BInterfaceUSB2.0(full-speed)Operating SystemWin 7/ XP/ Vista, Linux, Mac OS XLife time5 Years wivitouch, touch ...