Optical tracking technology works on various surfaces, ideal for home, office, or gaming use. Comfortable contoured design. Ultra-thin and highly portable. Bluetooth wireless technology, no USB receiver required. (Note: please check if your computer has Bluetooth functionality.) System support: Windows 2000, Windows XP, Windows 7, Windows Vista, Windows 98, Windows ME, Windows 8. Pointing Device Host Interface: Bluetooth Power Supply: 1 x AAA battery (Not included) Net Weight: 56g Item: Optical Mouse Type: Wireless Mouse Color: White Material: ABS Size: 55mm Package Contents: 1 x Wireless Mouse Only the above package content; other products are not included. Note: Lighting and different displays may cause slight color differences between the image and the actual item. Measurement error allowance: +/- 1-3cm.