Get the ultimate control over your computer with the Kensington SlimBlade Trackball Mouse. With its unique design, this mouse offers an incredible ergonomic shape with the deep red trackball and sleek black base. It achieves ultra precise tracking and scrolling with the 55mm ball and the built in laser technology. The SlimBlade Trackball Mouse also features four buttons that are all completely customizable to give you total control over an array of software and programs. You’ll get a smoother and faster computing experience for an increase in productivity right at your fingertips. The Kensington SlimBlade Trackball Mouse is compatible with Windows 8 and higher as well as Mac OS devices and works for both right and left handed users.