Comfort Mouse 4500Features Microsoft BlueTrack Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. Reassign the five customisable buttons to fit your needs and get quick access to the media, programs, and files you use most often.Rubber side grips and a contoured shape for use with either hand provide comfort and durabilityTilt wheel provides easy horizontal and vertical scrollingDust-resistant design keeps you tracking and moving confidently