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. Your computing experience gets smoother faster and easier with the Kensington SlimBlade Trackball different user modes. Choose navigation mode to control cursor and scrolling by simply twisting the ball. Media mode controls volume play/pause stop and track forward/backward. And it does it all with the ball to put complete control at your fingertips. For even greater productivity the four adjustable buttons can be set to the function or keyboard shortcut you use most with Kensington TrackballWorks software.- Simply twist the multi-function ball for fast and precise click free scrolling- PC and Mac compatible- Compatible with Windows Vista and Mac OS X. TrackballWorks software downloadable from www.kensington.com- Twist the trackball to control music playback and magnification with Music and Zoom trackball modes- Keep an eye on which trackball mode you are in and which function is being performed with the on-screen heads-up display- Four customizable buttons with Kensington TrackballWorks software- Optical technology delivers superior precision- Wired 150cm USB cable provides reliability and avoids need for batteries- With its low-profile shape you'll be able to use it comfortably for hours on end- Ambidextrous design for left or right-handed users- Luxurious Ruby red trackball and metallic silver finish