Kensington Orbit Optical Trackball Height-Adjustable Bases & Tables Some of these features include:

Some of these features include: 5" of height adjustment

Ergotron's Constant Force patented lift-and-pivot motion technology allows you to lift

plus 30° tilt

making it ideal to use with monitors of all sizes

Standing on this anti-fatigue mat encourages slight movement of lower legs for healthy movement

Kensington Orbit Optical Trackball Height-Adjustable Bases & Tables Some of these features include:The Kensington Orbit Optical Trackball combines the comfort of a regular mouse with the fingertip control of a trackball, plus saves you valuable desk space. Kensingtons Diamond Eye technology delivers precise tracking and cursor movement. Dust resistant mechanism reduces the need for cleaning. 5 Year Warranty