Logitech MK275 USB Wireless Keyboard and Mouse Set for Windows, 2.4 GHz Wireless, Compact Wireless Mouse, 8 Multimedia & Shortcut Keys, 2-Year Battery Life, PC/Laptop - BlackBrand Logitech Manufacturer Logitech, Logitech Asia Pacific Ltd Colour Black Item Height 44 Millimeters Item Width 15. 6 Centimeters Product Dimensions 50 x 15. 6 x 4. 4 cm; 726 g Batteries 3 AA batteries required. Item model number MK275 Power Source Battery Powered Hardware Platform Windows XP, Vista, Windows 7 and 8 Operating System Windows Battery Description battery_type_aaa Are Batteries Included No Lithium Battery Energy Content 1. 5 Watt Hours