Kensington Orbit Fusion Wireless Trackball Mouse ErgonomicDescriptionSpecificationsShipping Experience first in class trackball innovation. The Orbit Fusion Wireless Trackball provides an opportunity to experience ergonomist approved comfort, the superior control & precision benefits of a finger operated trackball, together with a patented scroll ring all within the familiar shape of a mouse. Perfect for new trackball users, the sculpted mouse like design provides all day comfort, offers five programmable