... Readily accessible for any finger· High quality industrial-class ABS plastic material with scratchproof texture surface· treatment· Removable weighted ... *20mmImage size280*360pixelInterfacefull speed USBCompatible OSWindows98,Me,NT4.0,2000,XP,Vista,WIN7(32bit)Operating Temperature0°-55° ... C / 32-131°FOperating Humidity20%-80%ColorBlackStandard ComplianceFCC Class B, CE, ICES, BSMI, MIC USB, WHQLGross ...