The Kensington Expert Mouse Wireless Trackball is the best finger-operated trackball because its large ball is responsive and smooth, the design is comfortable for both right- … And because trackballs require less wrist movement, they’re ideal for people who experience discomfort with traditional mice. Kensington trackballs are a favourite among power users. TrackballWorks™ allows you to program your Trackball to behave how you want it to by customizing the functions assigned to each Trackball button Introducing KensingtonWorks™ Kensington's award-winning TrackballWorks™ is being consolidated into KensingtonWorks™ to provide you with a simplified software solution to accommodate all of your Kensington trackballs, mice, and presenters. Trackballs require less desk space, since the unit itself remains stationary. 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