Kensington Orbit Wireless Trackball with Scroll Ring, Professional Computer Mouse with Bluetooth, (2.4GHz Wireless), Optical Tracking & AES Encryption Security, Left or Right Handed - Black (K70992WW) : Amazon.co.uk: Computers & Accessories
Orbit® Trackball with Scroll Ring | Featured Products | Kensington
K72352EU, Kensington Orbit® Wireless Mobile Trackball | EET
Kensington Orbit Ergonomic Wireless Mobile Trackball/Mouse Windows/Mac/PC/Apple | eBay
Kensington Orbit® Optical Trackball Mouse from Posturite
Kensington Orbit Mouse - Wireless Mobile & Compact Ergonomic TrackBall Mouse for PC, Mac and Windows with Touch Scrolling, Ambidextrous Design and Optical Tracking - Red (K72352EU) : Amazon.co.uk: Computers & Accessories