Kensington Orbit Wireless Trackball Mouse (K72352US) Wireless Trackball Mouse for comfort and precision Customizable 2-Button design via TrackballWorks software Compatible with all Windows, Mac OS, and Chrome (OS 44 and later) computers A distinctive centered-ball design gives you more comfort and precision 2.4 GHz wireless with storable nano receiver works wherever you do Unique touch scrolling lets you glide effortlessly through web pages and documents Wireless operation with USB dongle Ambidextrous design for left or right handed users Plug and play with no drivers needed