The quintessential control knob for all USB computers, PowerMate spins like a knob, and clicks like a mouse, but it's so much more! PowerMate is programmable to control practically any Mac or PC software application. PowerMate comes with presets for a wide range of applications, and easy-to-follow instructions for adding your own. Use PowerMate to speedily shuttle through large multimedia files, spreadsheets, word processor documents. PowerMate shines for DJing. Connect multiple PowerMates - as many as 127 - and assign an independent function to each of them! You can even control the behavior of the pulsing LED in PowerMate's base to give you system status at a glance.