TrackballsKensington Expert Mouse Wired Trackball K64325
A wired USB symmetrical trackball with a 55 mm ball, a scroll ring and 4 buttons, supplied with a detachable wrist rest.
~$87.65
Pretorian OPTIMAX Wireless Rollerball
The Pretorian OPTIMAX is a wireless trackball for users with motor skill difficulties, with a 51 mm ball and a receiver-based link working beyond 10 metres.
Some specs could not be matched to a source · Last verified: 2026-10-18
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Pros
- Recessed colour-coded buttons help prevent accidental clicks
- Two sockets for external switches
- Symmetrical body usable with either hand
- Latching drag-lock function
Cons
- No scroll wheel or scroll function is described
- Prices are listed only in GBP; no Japan or US pricing
Specs
| Handedness | Ambidextrous |
|---|---|
| Ball size | 51 mm |
| Ball position | Center |
| Buttons | 3 |
| Scroll | None |
| Weight | — |
| Connectivity | USB receiver |
| OS | windows, macos, chromeos |
| Released | — |
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