Experience first-in-class trackball innovation. The Orbit Fusion Wireless Trackball provides an opportunity to experience ergonomist approved comfort, the superior control and precision benefits of a finger-operated trackball and a patented scroll ring ?within the familiar shape of a mouse. Perfect for new trackball users, the sculpted mouse-like design provides all-day comfort, offers 5 programmable buttons for significant productivity gains, and three DPI settings for simple cursor control transitions. The premium laser tracking sensor and 40mm trackball allow users to navigate multiple monitors and large files with less desktop space and better precision and speed. Let your hand fuse with innovative comfort and control and preferred finger-controlled track and scroll.