Adesso Trackball T50
Adesso trackball, iMouse T50, came out in October, 2018.

- USB Wireless (2.4 GHz)
- Feature front legs so the surface of the trackball can be flat, for ergonomic reasons.
- Buttons are programmable. Requires Adesso software.
- 5 levels of DPI (400 to 4800).
Ball Size
Ball diameter: 50.8 mm
Good or Bad?
Lots of bad reviews on amazon. I'd recommend buying other trackball.