Kensington Orbit Trackball Mouse
Compared to all other trackballs, this one is Star Trek looking, but not so good. No scroll wheel. 2 buttons only.
though, someone used this trackball to play the game osu well!
for osu game, see Test Your Mousing Efficiency!
Light Mod
Alternatives
The following are all better.
If you have a question, put $5 at patreon and message me.