Microsoft 3600 Bluetooth Mobile Mouse You'll appreciate how the Bluetooth Mobile Mouse 3600 comfortably fits your hand and your mobile lifestyle. Use it just about anywhere, even on a rough park bench or your living room carpet, relying on Microsoft BlueTrack Technology1. No transceivers or wires to manage. Keep using your mouse for up to six months with a single battery. Features: - Compact for portability - 1 BlueTrack Technology does not work on clear glass or mirrored surfaces