Sanwa Wireless Trackball MA-WTB43BK
This one came out in , from Japan.
- Wireless 2.4GHz RF radio frequency AUTO LINK (24 square ID of 34CH × 2)
- 10m wireless range. 2 meters if on steel desk.
- laser sensor
- Resolution: 400 / 800 / 1200 / 1600 DPI
Vast majority of reviews on amazon are positive, saying this is better than the Logitech M570 Wireless Trackball.
Normal Left button and right button, groved.
Big scroll wheel. No tilt.
There are 3 buttons on top left. The two 2 buttons near the ball is browser forward and backward.
The far-away button seems to be DPI switch.
Work in Linux?
Yes. Works in Linux out of the box. No driver software needed.
You can remap mouse buttons the usual way. 〔➤see Linux: How to Swap Mouse Buttons〕
Speedlink APTICO Trackball
This seems to be rebranded in UK as Speedlink APTICO trackball.
here's a reddit review https://www.reddit.com/r/Trackballs/comments/45lxfe/got_a_speedlink_aptico_trackball/