Elecom DEFT Pro Trackball
This came out in 2018-05, and is one of the best trackball.
- 3 models: Wired, Wireless, Bluetooth
- Rechargeable. Just connect the USB cable to charge.
- 8 buttons. 3 on top. 3 on thumb area. and counting scroll wheel tilt as 2.
- Scroll wheel can tilt.
The left click button is actually on the thumb.
High Grade Tracking, Adjustable DPI
It uses modern (2018) tracking tech. So, not like many trackballs that's using 10 years old optics that's super slow.
Some people say this trackball has the most smooth spin, while many amazon reviews says it's the worst. I guess it depends on your luck.
Ball diameter is 44 mm.
Work in Linux?
Yes. Plug and play.
Linux kernel dated after 2019-05-30 supports the Fn1 Fn2 Fn3 buttons.
You can remap mouse buttons in Linux using
[see Linux: How to Swap Mouse Buttons]
It's good. Good reviews on amazon.
I'd rate this or the Logitech MX Ergo Trackball as best trackballs.
Buy at amazon