Kensington Advance Fit Wireless Mobile Trackball trackball - 2.4 GHz - graphite, Ruby Red

Ambidextrous design for right-handed or left-handed users Compatible with Windows 8 Compatible with Windows 7, Windows XP, Windows Vista , and Mac OS X On/Off switch helps prevent accidental battery drain Plug & Play installation Plug and play with no drivers needed Professional matt black high gloss black finish TrackballWorks software provides a customized productivity experience Unique touch scrolling along with compact 32mm ball lets you glide effortlessly through web pages and documents