This is a reverse private auction Kensington Expert Mouse Trackball has already finished

Kensington Expert Wireless Trackball Mouse The Expert Mouse wireless trackball gives you the freedom to be highly productive without being limited by a USB cable. The trackball can be connected via Bluetooth® 4.0 LE to save valuable USB port or connected via a USB nano-receiver. TrackballWorks™ software offers incredible customisation and optical tracking technology that delivers smooth, precise cursor control. Plus, our award-winning Scroll Ring lets you quickly scroll up and down web pages and large documents. Add it all up and you get exceptional comfort and ease of use from the company that has been setting the industry standard for trackballs for over 20 years.