Kensington SlimBlade

The Kensington SlimBlade Trackball lets you work comfortably and productively. The slim, flat shape offers lasting comfort - the advanced dual laser sensors and the large sphere provide exceptional precision. Working on the computer is even more comfortable and easy with the different modes of the Kensington SlimBlade Trackball. In navigation mode, move the cursor and scroll by rotating the ball.
In Media mode, you have full control over your music (volume, play/pause, stop, forward/backward) and in View mode, you can zoom in, zoom out and pan the display. And all these functions you control via the trackball!
For even more productivity, assign frequently used features or shortcuts to the four customizable trackball buttons with Kensington TrackballWorks software.