Your computing experience just got smoother, faster and easier with the Kensington SlimBlade™ Trackball. Choose navigation mode to control cursor and scrolling. Media mode controls volume, play/pause, stop, and track forward/backward, while view mode zooms in/out, and pans. And it does it all with the ball to put complete control at your fingertips. Scroll up and down web pages and documents with a simple twist of the 55mm ball Compatible with Windows Vista® and Mac OS® X. TrackballWorks™ software downloadable from www.kensington.com Sleek, low-profile design offers all-day comfort along with beautiful aesthetics Laser tracking technology delivers superior precision for increased productivity Free TrackballWorks™ software allows you to customize buttons, cursor and scrolling speeds Wired 150cm USB cable provides reliability and avoids need for batteries Plug & Play installation Ambidextrous design for left or right-handed users Luxurious Ruby red trackball and metallic silver finish PC and Mac® compatible