Compact for portability 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. Its compact design makes it ideal for travel. 4-way scroll wheel for navigating up, down, left and right Take advantage of BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. Comfortable in either hand: Use your mouse with your left or right hand. Ambidextrous design makes it comfortable either way. Bluetooth smart: Clutter-free and reliable experience utilizing the latest in Bluetooth 4.0 technology. Use your mouse for up to six months without having to change batteries.