Best of all it comes with all the features that made the success of the Microsoft IntelliMouse Explorer, such as the scrolling wheel and the two new customizable buttons. The TrackBall concept basis is to provide users with a fixed poiting device that they don t need to move so they can save space on their desk. The sensor snaps pictures of the marbled ball at a rate of 2,00 images per second and then translates changes between the images into onscreen movements. This technique, called image correlation processing, results in smooth, precise pointer movement. The scrolling and zooming wheel lets users enjoy universal scrolling in their favorite applications directly from their mouse without having to use scrollbars.
Users can zoom without using toolbars or menus.
Two new customizable function buttons provide effortless Internet navigation with their forward and back default settings. The buttons, located on theleft side of the mouse, can also easily be mapped to execute useful program shortcut commands, like print or cut and paste. A proven ergonomic design allows users to align their hand and forearm in a natural, relaxed position on the trackball. The shape of the TrackBall Optical supports the entire hand and fingers, while the slope helps keep the hand and forearm aligned naturally. The Microsoft TrackBall Optical comes with a five year hardware warranty.