Kensington TURBO MOUSE PRO 64240 2-Tone Mouse - Newegg.com
"Quality construction and ergonomic design reduces risk of carpal tunnel for heavy-duty users, versatile button layout (with chording and macros), great driver (Windows XP), smooth and easy trackball control..."
"Overall, I bought 3 of these back when they were being made..."
"Worth every penny, considering that whenever I did my work without them, I was good for a month before the first twinges of carpal..."
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Amazon.com : Kensington Wireless Turbo Mouse Pro for Mac ...
Amazon.com : Kensington Wireless Turbo Mouse Pro for Mac : Kensington Expert Mouse : Electronics ... Item model number: 64240; Average Customer Review: ...
New Kensington Turbo Mouse Pro Trackball 64240 Expert | eBay
NEW kensington turbo mouse pro trackball 64240 expert in Computers/Tablets & Networking, Keyboards, Mice & Pointing, Mice, Trackballs & Touchpads | eBay...