CST2545W (L-TRAC) USB Wired High Performance Trackball, Black - Made in the USA

The CST2545W has selectable resolutions of up to 1600CPI, which are "button selectable", allowing rapid changes of sensitivity. The high performance laser navigation system is capable of tracking at greater than 20 inches per second. The scroll wheel is smooth and readily accessible, located above the center button. Superior-X Button Control software (included), allows the user to set different button settings depending on the application. The shape of the L-Trac acts as a natural hand rest mirroring the natural contour of your hand. Designed to easily accommodate either right, or left handed users and different size hands. Website: www.clearlysuperiortech.com