Bluetooth Version:Bluetooth2.0Button quantity:3Scroll Wheel:1Tracking Method:OpticalResolution:800-1600CPICan I change the CPI:Yes, 800/1000/1200/1600CPIErgonomics:NoSurface Process:Rubber oilPower:2 AAA alkaline batteries requiredPower Switch:NoCan I recharge by USB Port:NoReport Rate:125

Bluetooth2.0 Wireless Optical Mouse