Comfort Mouse 4500 for Business - Work in Comfort, Stay in Control Work anywhere1 with this full-featured mouse, which delivers comfort in either hand and the precise control of Microsoft(R) Blue Track Technology TM at a great value. Blue Track Technology Take advantage of Blue Track Technology, which combines the power of optical with the precision of laser for remarkable tracking on virtually any surface. Comfort and Durability Enjoy rubber side grips and a contoured shape suitable for either hand. Dust-resistant design enables you to track confidently. Five Customizable Buttons Assign any button to fit your needs and gain quick access to the media, programs, and files you use most often. Tilt Wheel Scroll horizontally and vertically. System Requirements Windows-based computer | Macintosh-based computer Computer/Operating System Windows 7, Windows Vista, Windows XP (excluding Windows XP 64-bit) Other USB