Microsoft BlueTrack Technology combines the power of optical with the precision of laser for remarkable tracking on virtually any surface
Leave the Nano Transceiver plugged in when you’re on the go or stow it in the mouse
Use your mouse without power interruption for up to 8 months on a single battery. Battery status indicator tells you when battery power is low
Conserve more battery power by turning your mouse off when not in use
Use your mouse with your left or right hand-ambidextrous design makes it comfortable either way

BlueTrack Technology – Microsoft BlueTrack Technology combines the power of optical with the precision of laser for remarkable tracking on virtually any surface.
Comfort and durability – Rubber side grips and a contoured shape for either hand. Dust-resistant design allows you to track confidently.
5 Customisable Buttons – Reassign any button to fit your needs. Quick access to the media programs and files you use most often.
Tilt Wheel of easy horizontal and vertical scrolling.
3 Year Warranty
Windows 7 Windows Vista Windows XP (excluding Windows XP 64-bit)
2 AA Alkaline Batteries required (included)