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
PI Engineering X-keys O-Trac Trackball
A wired USB ambidextrous trackball from PI Engineering with a 57 mm ball and three buttons, where the middle button works as drag lock or scroll lock.
Key specs auto-matched against source pages · Last verified: 2026-10-18
~¥24,100
Where to buy
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Pros
- Large 57 mm ball for precise control
- Symmetrical ambidextrous shape for left or right hand
- Middle button offers drag lock and scroll lock
- Works out of the box without software
Cons
- Wired only, with no wireless option
- Only three buttons
- Currently on backorder on the Japan store
- Plain styling and no scroll wheel
Specs
| Handedness | Ambidextrous |
|---|---|
| Ball size | 57 mm |
| Ball position | Center |
| Buttons | 3 |
| Scroll | Ball |
| Weight | 467 g |
| Connectivity | USB |
| OS | windows, macos, linux |
| Released | — |
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