Kensington Orbit Wired Trackball Mouse with Scroll Ring K72337EU
Wheel emulation - Trackballs.EU
Trackball genius HiTrak Serial | Aukro
Genius BlueTrack Computer Mice, Trackballs & Touchpads for sale | eBay
Kensington SlimBlade Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Red (K72327EU) : Amazon.co.uk: Computers & Accessories
Sky Solutions Anti Fatigue Mat - Genius Standing Desk Mats - Ergonomic Surface w/ Rolling Massage Ball & Trigger Pressure Points - Work & Office Accessories : Amazon.co.uk: Home & Kitchen