Logitech Trackman Trackball Mouse: Stay comfortable while navigating features on your computer with this ergonomic trackball mouse, which reduces hand and wrist motion. Accommodate multiple users in your household, since the ambidextrous design allows right- and left-handed operation.
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WIndows 8.1 recognized the trackball as soon as it is connected. No special programs are required for basic operations. For all the buttons to operate fully must download the software from Logitech. For example for the scrolling function to work. It is not for precise applications. For that you will require a more advanced trackball.