The ball is of a medium size. This trackball mouse has a good positioning with either a point finger or a middle finger on. The buttons are located on the sides. It has a rubber wrist rest. Using Kensington K72337 trackball mouse is the same as using an ordinary mouse, but instead of a scroll wheel you have a ball under your finger.
![Best Trackball Mouse Best Trackball Mouse](https://thewirecutter.com/wp-content/uploads/2018/05/trackballs-lowres-7152.jpg)
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