Using a computer without having a mouse is a difficult task. This mouse has just two buttons, so nothing out of the ordinary.
From Amazon
Kensington Orbit Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Blue (K72337EU)
Compadvance
KENSINGTON Orbit? Trackball With Scroll Ring
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