Kensington Orbit Trackball with Scroll Ring

Kensington Orbit Trackball with Scroll Ring -Optical tracking technology provides precise cursor movement for superior, improving productivity and efficiency; the medium 40mm ball has been specially designed with an absolute spherical, hard surface for precise tracking and control -Detachable Wrist rest softly cushions and cradles the hand and wrist in an ergonomic position for pain-free productivity during extended periods of activity on the computer. Ambidextrous design works equally well for both right-handed and left-handed users EXCELLENT CONDITION!