Summary

This is made to fit over the DROK USB Volume Control Knob to use with your foot.
https://www.amazon.com/dp/B01MV411BR

If you have Word or Notepad open and press the knob down when you plug it in, you can reconfigure it from the default volume control to be used as a scroll wheel.

The following video shows how it works.
https://www.youtube.com/watch?v=6c68ibi6V-c