The Microsoft Wireless Mobile Mouse 4000 fits life on the go. Home, gym, campus, office - quick stop for e-mail and coffee. This sporty, stylish little mouse goes wherever you do. With revolutionary Microsoft BlueTrack Technology, you can work more places than ever before, including on granite countertops, carpets - even on a wood table or a rough, unfinished park bench.
What is BlueTrack?
Microsoft's proprietary BlueTrack Technology works in more places than both optical and laser mice. To do this, BlueTrack Technology uses a wider and more uniform light beam and a better contrasting mechanism than laser/optical mice.