Midas-Link Bluetooth Wireless Optical 1000DPI 2xAA Power Supply Mouse For PC Android 3.1 Tablet(White+Gray) Effortlessly connect to any Bluetooth PC, laptop, or tablet computer Optical mouse with high resolution up to 1000dpi Compatible with windows XP / Vista / 7 / Server 2003 Please take a Bluetooth dongle first if your computer does not have Bluetooth function (Bluetooth dongle is not included) Power supply: 2 x AA alkaline batteries (batteries are not included)