2.4 GHz wireless provides a powerful, reliable connection. SPECIFICATIONS Model : FG20 Type : Wireless Connection : 2.4G Hz Operating Range : 10-15m Ergonomic Design : Symmetric Sensor : Optical Resolution : 1000/1600/2000 DPI Report Rate : 125Hz Buttons No. : 4 Receiver : Nano USB Receiver Dimension : 113 x 57 x 26 mm Weight : 62 g ( Batteries not included ) Battery : 2AAA Alkaline Batteries System Requirements : Windows XP / Vista / 7 / 8 / 8.1 / 10