Microsoft’s proprietary BlueTrack™ Technology works on more surfaces than both optical and laser mice.
Customer Reviews of Microsoft 4000 Mouse - BlueTrack - Wireless - Radio Frequency - USB - Tilt Wheel - 4 Button(s)
great product BUT...3/7/2013
pros- works great on mouse friendly surfaces cons- kinda choppy when used on surfaces that are not mouse friendly. i got this product so it could be used on any surface its not awful product but not amazing either for what its advertised. the blutrack technology has to be calibrated better on microsoft's part.
Favorite Wireless Mouse6/18/2012
Great buy. Battery life is excellent. Best wireless mouse I have found for travel and desktop use. Comfortable grip and button locations. BlueTrack optics can be used on any hard surface, and even works well on armchair or pantleg when really taking it easy.