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
AbleNet BIGtrack 2.0
An assistive USB trackball with a 3-inch (76 mm) ball, two large colour-coded buttons placed behind the ball, and two 3.5 mm switch jacks for left and right click.
Key specs auto-matched against source pages · Last verified: 2026-10-17
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Where to buy
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Pros
- Large 76 mm ball can be moved with gross motor movements of the hand, arm or foot
- Buttons sit behind the ball to reduce accidental clicks
- Two 3.5 mm switch jacks for external left/right click switches
- Drag lock lets users move items without holding a button
Cons
- No scroll wheel or scroll function is mentioned
- Wired USB only (USB Type-A port required)
- Switches are sold separately
Specs
| Handedness | Ambidextrous |
|---|---|
| Ball size | 76 mm |
| Ball position | Center |
| Buttons | 2 |
| Scroll | None |
| Weight | — |
| Connectivity | USB |
| OS | windows, macos, ios |
| Released | — |
Sources
AD · detail-mid
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