-Material: the upper case and keys are made of Zn-Al alloy, and stainless steel for the lower case.
-Operating Temp: -20°C~60°C
-Electric specification:
    Operating voltage: 3.3V~5.0V±10%
    Power  consumption: <1.0W (dynamic), <0.2W (static)
    Electronic interface: USB or PS2
-OS: Windows 98, ME, 2000, XP, VISTA, 7
-Accessory: Cable, Cable clamp, Screw