Features: 100% brand new and high quality. Rechargeable wireless type. Built-in rechargeable lithium-ion battery,very convenient to use, dispense with frequent battery replacement trouble, comes with a recharging usb cable. System requirement: Windows 2000/XP/Vista/7, Linux, M-a-c OS,above. Fashionable Pink Girl design: Slim design for sleek look and easy to use Ergonomically designed, optical tracking technology, working on many different surfaces and ideal usage for home, office or game. Suitable for PC Laptop Desktop Computer With USB port.