Item model number: IMOUSE T40Ergonomic contour design - Minimizes pain and discomfort in forearm muscles from twisting, which can cause carpal tunnel syndrome.
Built-in 1.5” large trackball with optical sensor - accurately and precisely tracks with less muscle movement for maximum comfort.
East to install programmable driver - friendly user interface that lets you change button assignments, DPI sensitivity, scrolling speed.
Removable trackball - Can Be easily removed by pushing the trackball from underneath the mouse.
Adjustable DPI switch - adjustable cursor moving speed from 400-4, 800 DPI.