The Kensington Orbit Trackball with Scroll Ring is a sleek and reliable computer accessory designed for precise navigation. This black trackball offers an ergonomic design for comfortable use and optical tracking method for accurate movement. With two buttons and a scroll ring, this wired unit from Kensington is new in the box, the box has been opened, and product has been tested and works perfectly. ready to enhance your computing experience. Perfect for those who prefer a trackball for their computer navigation needs.