Expert Trackball Mouse Universal USB Optical Mouse with Scroll Ring Large Ball

Scroll Ring and Large Ball

Spin the dial to move up and down web pages or documents with complete ease while the grey ball has been specially designed with an absolute spherical hard surface for precise tracking and control

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1 Scrollring for precise fingertip scrolling without requiring the arm movement
2 Use KensingtonWorks software to customize the four buttons functions modify scrolling behavior and fine tune the pointer

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KensingtonWorks Customization

Free downloadable software provides an even more personalized experience giving you the ability to assign a wide variety of program functions to each of the 4 buttons as well as controlling the pointer speed and scrolling speed