Bestrunner Ultra Thin 2.4G Wireless 4D 800 1000 1200DPI Optical Mouse  Specifications: Colors: Green， White， Black， Red， Pink， Orange， Blue Resolution: 800 1000 1200 DPI Transmission distance: 10m Buttons:4 keys with 3 keyings and 1 scroll wheel design 7 colors for choice Power supply: 2 * AAA batteries ( Not included ) The dongle can be stored inside the mouse when not in use Operation systems: Windows 98SE\/ME\/2000\/XP\/Vista， Windows 7， Windows 8 Size:Approx 11 x 5 x 2.8 cm\/4.3"X1.96"X1.1" (L x W x H) Super thin 2.4GHz wireless Mouse Ideal laptop companion for home and office use  Package included: 1 x 2.4G Wireless Mouse 1 x USB Receiver