If you liked your ADB Turbo Mouse, you’ll love what Kensington has for you now!
Wireless and wired, the Expert Mouse Pro is an optical trackball with a nice wrist rest and a scroll ring. (Note: the wrist rest isn’t shown in that photo, it’s in the larger photograph in the product information.)
It has a large ball, like the TurboMouse. It also has four buttons. If you’ve been considering another input device, I would strongly recommend you look at the Kensington Expert Mouse Pro.
Now I’m wishing I didn’t buy two of these Logitech Trackman Opticals.