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 OS, for Windows ME, for Windows 8100% brand new and high quality. Pointing Device Host Interface: BluetoothPower Supply: 1*AAA battery (Not Included) Net Weight: 56gItem: Contact MouseType: Wireless MouseColour: whiteMaterial: ABSSize: x 55mmPackage Contents:1 x wireless mouseOnly the above package content, other products are not included.Note: Light 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.