Optical tracking technology, working on many different surfaces and perfect usage for home, office or game. Contact Optical mouse, comfortable Contact. Ultra thin design, it is very portable. Bluetooth wireless technology, no need usb receiver.(Note: please check if your computer has bluetooth function) System support: for Windows 2000, for Windows XP,for Windows 7,for Windows Vista, for Windows 98, for Mac OS, for Windows ME, for Windows 8 100% brand new and high quality. Pointing Device Host Interface: Bluetooth Power Supply: 1*AAA battery (Not Included) Net Weight: 56g Item: Contact Mouse Type: Wireless Mouse Colour: white Material: ABS Size: 111 x 55mm Package Contents: 1 x wireless mouse Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.