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 8100 percent brand new and high quality.Pointing Device Host Interface: BluetoothPower Supply: 1xAAA battery (Not Included) Net Weight: 56gItem: Contact MouseType: Wireless MouseColour: whiteMaterial: ABSSize: 111 x 55mmPackage Contents:1 x wireless mouseOnly 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.