This ergonomic trackball is perfect when you don't have an area for a traditional mouse. It works in a confined area and can sit on your lap or couch and works with great precision!
This is the only trackball for me -- I love the configuration, which allows for my first two fingers to be used for left-click/right-click while my thumb moves the mouse. I hate the split-fingered form factor that you see on most trackballs these days (although, in defense of that config, that makes it universal so lefties can use it as well).
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