The ultimate trackball! Seventh generation, award winning trackball. Expert Mouse features DiamondEye technology and precision Scroll Ring, ensuring maximum accuracy and performance. And it works with your computer right out of the box.

Features:

Diamond Eye Optical Technology
The most advanced cursor control technology availible on the market. Unmatched acceleration control, combined with ultra-high speed optical technology proves the ultimate in precision and accuracy.

Award Winning Scrolling
The most effortless and natural way to scroll on a trackball - simply rotate the Scroll Ring for precise scrolling in any document or web page. Your hand never has to leave the ball!

Exceptional comfort
The most comfortable Expert Mouse ever, the contoured design conforms to the natural position of your hand. You are cradled in comfort as you roll the ultra-smooth ball or activate any of the four mouse buttons located at your fingertips.

MouseWorks Software Simplifies Complex Tasks
With the award-winning MouseWorks software and 4 programmable buttons, you can move forward and backward between pages on the internet or launch your favorite applications or documents with a single click!

Compatable with Windows 98/2000/XP/Vista/7, MacOS X 10.1 or higher.