Kensington Expert Mouse Optical Trackball

Surrounding the ball, is an award Scroll Ring® that puts scrolling right at your fingertips letting you fly through web pages and documents. There's even a soft wrist rest included with the Expert Mouse® trackball for comfort and convenience no mouse can match. Designed for PCs and Macs and a large ball for exceptional control the Expert Mouse Optical Trackball sets the industry standard.

Key Features:

• Large 55mm ball for maximum precision, control and comfort
• Save time and increase productivity with the award winning click free Scroll Ring®
• Optical DiamondEye technology delivers superior precision
• Four customisable buttons with Kensington TrackballWorks software
• Stationary trackball design optimises desk space when compared to a mouse
• Ambidextrous design for left or right-handed users
• Wired 180cm USB cable provides reliability and avoids need for batteries
• Detachable wrist rest cradles hand in comfort
• PC and Mac® compatible
• System requirements: PC running Windows 98 or later with an available USB or PS2 port.Mac® running OS X or later with an available USB Port.Internet connections or CD ROM drives to install the software.Compatible with Windows®7, Windows® XP, Windows Vi