Comfort and productivity are at your fingertips with the Kensington SlimBlade Trackball. The slim, low-profile design provides all-day comfort while the advanced dual laser sensors and large ball deliver exceptional precision. For even greater productivity, the four adjustable buttons can be set to the function or keyboard shortcut you use most with our TrackballWorks software. Operating System Supported: Mac & PC compatible, including Windows Vista, Windows XP, and Mac OS X Features: Multi-function ball lets you easily navigate through your music, pictures and documents using media or document view mode Keep an eye on which application you are in and which function is being performed with the heads-up display on your monitor With its low-profile shape, you'll be able to use it comfortably for hours on end The sleek stationary design saves your desk space Gain fingertip access to image and media controls Control cursor and scrolling; volume, play/pause, stop, and next; zoom in/out, and pan, all with the ball Mouse function updates: http://us.kensington.com/html/ 17763.html Parts: 2 years limited Labor: 2 years limited