Offering a precise, compact and versatile experience, the orbit wireless mobile trackball has everything mobile professionals need for comfort and productivity. It offers better ergonomics, with less wrist and hand movement that will ease The pain of repetitive-stress injuries. With no cables to tie you down, The 2. 4 GHz wireless Nano receiver works with either Windows or Mac when you're at home, on the road or in the office. Unique touch scrolling, along with the compact 32mm ball, lets you glide effortlessly through web pages and documents, and the Nano receiver can be stored right inside the trackball.