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
NSI R55 Desktop Office Trackball
An industrial-grade desktop trackball with a 57 mm ball, three buttons and a high-impact plastic housing, connecting over USB or PS/2 and meant for office, CAD/CAM and clean industrial use.
Key specs auto-matched against source pages · Last verified: 2026-10-17
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Where to buy
No US retailer found yet. Official site
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Pros
- Large 57 mm ball for precise pointer control
- Rugged ABS/high-impact plastic housing with stainless steel shaft and bearings
- USB and PS/2 outputs with automatic selection
- Works with PC and Mac
Cons
- Unsealed (IP40), so not suited to wet or dirty environments
- No dedicated scroll wheel on the pages; scrolling depends on the VX3 zoom feature
- Sold through industrial channels, with no retail price listed
Specs
| Handedness | Ambidextrous |
|---|---|
| Ball size | 57 mm |
| Ball position | Center |
| Buttons | 3 |
| Scroll | None |
| Weight | — |
| Connectivity | USB |
| OS | windows, macos |
| Released | — |
Sources
AD · detail-mid
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