All-day comfort and scrolling come together in the Orbit Trackball with Scroll Ring. For click-free scrolling, the scroll ring allows you to fly through web pages and documents. It also delivers comfort and space savings. Optical technology delivers precise tracking - no cleaning required. Ambidextrous design allows easy use by left-handed or right-handed users. Trackball offers USB connectivity and is PC (Windows 8 too) and Mac compatible.