If you're ready for a new mouse, you may like Microsoft's Wireless Mouse 5000 or their Wireless Mobile Mouse 6000 with BlueTrack tracking technology built in. BlueTrack is a new tracking technology—available only from Microsoft— that allows you to use a mouse anywhere and work on more surfaces than ever before. BlueTrack combines the power of optical with the precision of laser, allowing you to mouse on virtually any surface. Learn more about BlueTrack Technology: Microsoft Hardware.