Mouse KENSINGTON Orbit Trackball SR black

Supreme comfort and easy scrolling meet in Kensington's Orbit Trackball with Scroll Ring. The scroll ring allows you to smoothly fly through web pages and documents while the trackball delivers comfort and saves space. Connection: Cable - USB No. of mouse buttons: 2+scroll Grip: Right/Left System requirements: Windows 8, Vista, Wiindows 7, XP, Mac OS