Size(mm): 112?2?2mm Weight(kg): 0.0918kg Key-Press Life: 150Million Key Quantity: 5 DPI: 800DPI RF Band: 2.4G Hz connector: USB dongle ID/CHs: 256 ID(ID 0-ID 255,4CHS) Distance: over 10M Battery: AAA? Power Consumption: 3.0V DV/20mA Switch/MTBF: 70?0gf/up to 1kk times Wheel: 1 Scrolling Wheel Safe Certificate: CE,FCC,ROHS Easy Scrolling Under: Compatible with windows95,98,Me,NT 4.0,2000,XP Mac OS 8.5~9.X Color: black,gold,silver Connector: