... glass), AR glass 92%, Tempered glass 88%EnvironmentalTemperatureOperating 0°C ~ 55°C Storage -30°C ~ 80°CRelative HumidityOperating 10% to 90 ... -condensing)ElectricalPower Supply USBESDPer EN 61000-4-2 Level 4. Contact discharge 8KV, air discharge 15KVAgency ApprovalsCE, FCC Class BInterfaceUSB 2 ... ,Windows XP,Windows Vista,Linux,Mac OS XLife Time5 years 55" Optical Touch-Screen