Kensington Expert Mouse Wired Trackball

The Expert Mouse Wired Trackball is the ultimate productivity enhancer that makes working at the desk quicker, more accurate and extremely comfortable for your hand and wrist. Featuring DiamondEye technology, the trackball uses optical tracking to precisely follow small flecks embedded in the large 55mm ball to provide smooth, accurate cursor control. The four buttons are customizable using Kensington highly intuitive Trackball Works software, while their award-winning Scroll Ring lets you quickly scan up and down web pages and large documents. Add it all up and you get exceptional comfort and ease-of-use that has set the industry standard for more than 20 years. • Trackball Works lets you customize all 4 buttons, set cursor speed • DiamondEye optical tracking technology for premium cursor control and accuracy • Award-winning Scroll Ring lets you scan up and down pages with ease • Large 55mm ball is designed as a perfect sphere to provide exceptional precision • Detachable wrist rest supports hand and wrist for ergonomic comfort • Reliable wired USB connection Trackball Works Customization Free downloadable software provides an even more personalized experience, giving you the ability to assign a wide variety of program functions to each of the 4 buttons, as well as controlling the pointer speed and scrolling speed. DiamondEye Optical Tracking Movement detection technology provides smooth, precise cursor control so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. Scroll Ring and Large Ball Spin the dial to move up and down web pages or documents with complete ease while the Gray ball has been specially designed with an absolute spherical, hard surface for precise tracking and control. Ambidextrous Design Works equally well for both right-handed and left-handed users to get the most out of their trackball. Detachable Wrist Rest Soft cushioning cradles the hand and wrist in ergonomic comfort for pain-free productivity during extended periods of activity on the computer.