This like new Porlei wired trackball mouse, model TM552 Trackball Mouse, is designed for large hands with an ergonomic design that reduces wrist and muscle strain. It is compatible with personal computers and offers a sleek design in A-Purple color. This trackball mouse features a glossy finish, right-hand orientation, and a corded electric power source. With a total weight of 0.6 pounds, it connects via USB and is suitable for office use on Windows, Mac OS, and Linux operating systems, and etc. "Sold as-is, no returns."