The Ultimate Trackball!
The best trackball ever made has just gotten better. Designed for PCs and Mac's the new Expert Mouse employs Kensington's Diamond Eye optical technology for smooth precise cursor movement. Surrounding the ball we have a brand new implementation of our award winning Scroll Ring that puts scrolling right at your fingertips. More comfortable than ever the Expert Mouse even comes with a soft new wrist rest-right in the box! You get all of these great new features along with the same large ball exceptional control and ease-of-use that has set the industry standard for more than 15 years.

• Internet connections or CD-ROM drives to install the software
• Operating Systems:

• Microsoft Windows 98 or later
• Windows 8
• Mac OS X or later