A4TECH FSTYLER FG20 2.4G WIRELESS MOUSE SPECIFICATIONS Model: FG20 Type: Wireless Connection: 2.4G Hz Operating Range: 10-15m Ergonomic Design: Symmetric Sensor: Optical Resolution: 1200/1600/2000 DPI Report Rate: 125Hz Buttons No.: 4 Receiver: Nano USB Receiver Dimension: 113 x 57 x 26 mm Weight:85 g (w/ battery) Battery: 2AAA Alkaline Batteries System Requirements: Windows XP / Vista / 7 / 8 / 8.1 / 10