Blue Track Technology - Work anywhere with the world\'s most advanced tracking. Comfort and durability - Rubber side grips and a contoured shape for either hand. Dust-resistant design - Allows you to track confidently. Tilt wheel - Easy horizontal and vertical scrolling. 5 customizable buttons - Personalize your mouse any way you want. Work in comfort, stay in control. Work anywhere with this full-featured mouse, which delivers comfort in either hand and the precise at a great value. With revolutionary Microsoft Blue Track Technology, you can work more places than ever before, including on granite countertops, carpets--even on a wood table or a rough, unfinished park bench.