Kensington SlimBlade Pro TrackBall Review: An Ergonomic Mouse Alternative
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
Kensington SlimBlade Pro Trackball Review: Fully loaded, but not for beginners | AppleInsider
Kensington SlimBlade™ Trackball, 0 in distributor/wholesale stock for resellers to sell - Stock In The Channel