Control your cursor with a simple touch of the finger! The highly accurate Orbit® Optical is as easy to use as a regular mouse, but it stays in one place saving you valuable desk space. The precise optical tracking mechanism is also resistant to dust, reducing the need for regular trackball cleaning.DiamondEyeTM optical technology for precise tracking and cursor controlThe comfort of a mouse and the fingertip control of a trackballUses less arm movement and desk space than a conventional mouseUSB and PS/2 connectivity for greater compatibilityKensington's unmatched satisfaction guarantee - five-year Kensington warranty and Kensington's toll-free technical support
the Orbit Optical Trackball by Kensington is a favorite of mine and suits my purpose well as I have limited movement in my hands at times and I can use this with my palm...