"KensingtonWorks™ CustomizationFree 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.
**ChromeOS user can get HID functions for a trackball but will not be able to customize their device through KensingtonWorks.
DiamondEye™ Optical TrackingMovement 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 efficiencyScroll Ring and Large BallSpin the dial to move up and down web pages or documents with complete ease while the grey ball has been specially designed with an absolute spherical, hard surface for precise tracking and controlAmbidextrous DesignWorks equally well for both right-handed and left-handed users to get the most out of their trackballDetachable Wrist RestSoft cushioning cradles the hand and wrist in ergonomic comfort for pain-free productivity during extended periods of activity on the computer.
KensingtonWorks™ lets you customize all 4 buttons, set cursor speedDiamondEye™ optical tracking technology for premium cursor control and accuracyAward-winning Scroll Ring lets you scan up and down pages with easeLarge 55mm ball is designed as a perfect sphere to provide exceptional precisionDetachable wrist rest supports hand and wrist for ergonomic comfortReliable wired USB connection"