- 51 mm kball
- 3 standard mouse buttons
- PS/2 default with USB adapter
- detachable wrist rest pad
- High reliable micro-switches
- Dimentions: 7.6″ × 4.7″ × 2.4″
Most amazon reviews say it's ok.
The iOne trackball is sometimes seen as Qtronix brand.
Here's a older model.
If you have a question, put $5 at patreon and message me.