Kensington Orbit Scroll Ring Trackball All-day comfort and scrolling come together in the Kensington Orbit Trackball with Scroll Ring. The Scroll Ring allows you to fly through web pages and documents. And all while delivering comfort and space savings no mouse can match. Features: - Save time and increase productivity with the award winning click free Scroll Ring - Two customizable buttons with Kensington TrackballWorks software - Optical technology delivers superior precision - Ambidextrous design for left or right-handed users - Stationary trackball design optimises desk space when compared to a mouse - Detachable wrist rest cradles hand in comfort - Wired 150cm USB cable provides reliability and avoids need for batteries - Professional black and blue finish compliments the Kensington Pro Fit family - Compatible with Windows 7, Windows XP, Windows Vista, and Mac OS X. TrackballWorks software downloadable from www.kensington.com Specifications: - Compatibility: Mac OS, Vista, Windows 7, Windows 8, XP - Connectivity: Wired - Controls: Scrollring - Sensor: Optical What's in the box: - Kensington Orbit Scroll Ring Trackball