Compact Design for ultimate portability Its compact design makes it ideal for travel. 4-way Scroll wheel 4-way scroll wheel for navigating up, down, left and right BlueTrack Technology® Take advantage of BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface.1 Take advantage of BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface.BlueTrack Technology does not work on clear glass or mirrored surfaces. 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. Up to 6-Month Battery life Use your mouse for up to six months without having to change batteries.