1)wireless optical mouse; 2)USB port with 800dpi; 3)27 MHz radio frequence; 4)8)Compatible with Windows NT/ME/2000/XP

Channel: 256ID channelButton switch: 3 button with scolling wheelButton lifecycle: 1 millionResolution: 800 DPIButton switch operating force: 70+10gPower: 5V, 10mA max,2AAA batteriesFrequency: 27MHzCompatible: Microsoft serial mouse / IBM PS/2 MouseBattery life:6 month (4 hours/day)Operating coverage: 1.5 meter

27MHz Wireless Mouse