Designed for PCs and Macs, the new Expert Mouse employs Kensington's DiamondEye optical technology for smooth, precise cursor movement. Surrounding the ball is a brand new implementation of the award winning Scroll Ring that puts scrolling right at your fingertips. More comfortable than ever, the Expert Mouse even comes with a soft wrist rest in the box! You get all of these great features along with the large ball, exceptional control, and ease-of-use that have set the industry standard for more than 15 years.

Guarantees
· 100% money-back guarantee including shipment cost for 60 days
· Quick shipping
· 1 year manufacturer warranty
· Dioxide emissions off-setting

Advantages
· Large and comfortable ball. The ball is big and comfortable for a smooth and accucate mousing.
· DiamondEye Optical tracking. The trackball uses the best optical technology for a superior accuracy.
· Scroll ring. Located at the tip of your fingers, it offers a fast and easy scrolling of web pages and documents, without click.
· Small footprint. The trackball allows you to control your cursor with your fingers. Avoiding movements to move your mousing device saves desk space.
· Fingers-operated. No more need to move your hand around in order to move your cursor. The trackball moves with your fingers, reducing the strains and pains associated with the use of traditional mice that require moving the fingers, hand and arm.
· Exceptional comfort. All buttons and scroll ring are located right under your fingers, the ball feels comfortable and a detachable wrist rest in included.
· Ambidextrous design. Left and right handed users can use the trackball. You can also switch the hand to share the fingers work during the day.
· Programmable functions. The software TrackballWorks customizes the functions of each button. Result: a more productive computing experience customized to your needs. Define your mousing functions or keyboard shortcuts for each favorite button or combination of buttons on the trackball, adjust the speed and acceleration of the pointer, and much more.