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 OPTIMA Rollerball
The Pretorian OPTIMA Rollerball is a wired USB (PS/2 adapter included) ambidextrous desktop trackball with a 51 mm ball and optical tracking, designed with users with limited motor skills in mind.
Some specs could not be matched to a source · Last verified: 2026-10-18
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Where to buy
View at Inclusive TLCView at School HealthView at Special Needs Computers (Canada)View at Liberator (UK)View at Assistive Technology NZ
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Pros
- Optical tracking with no mechanical wearing parts
- Recessed buttons reduce accidental clicks
- Symmetrical design suits left or right hand
- Two external switch jacks and four speed settings
Cons
- Wired only, no wireless option
- Large footprint (about 180 x 102 mm)
- No regular retail in Japan or the US confirmed
Specs
| Handedness | Ambidextrous |
|---|---|
| Ball size | 51 mm |
| Ball position | Center |
| Buttons | 3 |
| Scroll | None |
| Weight | — |
| Connectivity | USB |
| OS | windows, macos, chromeos, ios |
| Released | — |
Sources
AD · detail-mid
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