Size(mm): 118?0?2mm Weight(kg): 0.0946kg Working Principle: wire optical gaming Wheel: 1 scrolling wheel DPI Indicator: three grade led DPI: 800/1600/2000DPI Easy Scrolling Under: Compatible with windows95,98,Me,NT 4.0,2000,XP Mac OS 8.5~9.X Safe Certificate: CE,FCC,ROHS Switch/MTBF: 70?0of/up to 1kk times key Quantity: 5 Color: gray,silver,red Connector: USB