FREER 2.4GHz 1000 / 1600DPI Wireless Optical Mouse - Grey (2 x AAA)
Color: Grey + black - ABS material housing - Frequency: 2.402~2.408GHz - Working channels: 16 - Resolution: 1000 / 1600 DPI - Operation range: 6~10 meters - Powered by 2 x AAA battery (not included) - Compatible with Windows 2000 / XP / ME / Vista / 7 - Comes with USB 2.0 receiver