Kensington Expert Trackball Mouse
- 55 mm ball, optical tracking
- Wired USB trackball
- 4 buttons plus scroll ring
- Ambidextrous shape with detachable wrist rest
- Windows and macOS listed, also Chrome OS
- 5 year warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A desk trackball for people who want to rest the hand and roll the ball with fingers. It is wired and large, so it suits a fixed workspace.
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ASIN: B00009KH63Model: 64325Category: Trackballs
Styles Available
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Overview
A wrist and hand saver working at a desk gets a large ball that the fingers roll while the hand stays still. Optical tracking reads flecks in the ball, and the scroll ring moves pages without a wheel.
The reason to buy is steady cursor control without sweeping the arm across the desk. The four buttons can be customized with the maker software. The listing is mixed on battery and range details, so the wired connection is the one to rely on.
Who it's for
A permanent desk with room for a wrist rest and a USB port is the right place for it. Anyone who needs a wireless or travel pointer, or who prefers a classic mouse, will not enjoy the learning curve.
Pros and cons
- Large ball for fine control
- Scroll ring for long pages
- Wrist rest detaches
- Buttons are customizable
- Battery line conflicts with corded power
- Software needed for button changes
- Large desk footprint
Performance notes
An optical sensor reads the ball surface, so cursor movement comes from the fingers rolling it rather than from sliding a body across the desk. Smooth tracking depends on keeping the ball and sensor area clean. Button actions are set in the maker software.
Where it stands among trackballs
- #1 most-searched brand and model of the 19 trackballs lines we track (by search demand, not sales).
From the specs of the 15 trackballs we list; not a test result.
Specifications
| Model | 64325 |
|---|---|
| Dimensions & fit | |
| Item Dimensions L x W | 9.75"L x 3.5"W |
| Hand Orientation | Ambidextrous |
| Item weight | 0.34 kg |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Enclosure Material | Plastic |
| Color | Black Silver |
| Finish | Matte |
| Compatibility & installation | |
| Compatible Devices | Windows 7, Windows 8, Windows 8.1, Windows 10, macOS 10.8 and above, Chrome OS 44 or above |
| Connectivity Technology | USB |
| Included components | |
| Included Components | Detachable Wrist Rest, Kensington Trackball 4-Button Usb Expert Mouse |
| Warranty & support | |
| Warranty Description | 5 Year Warranty |
| Other details | |
| Additional Features | Ergonomic Design |
| Button Quantity | 3 |
| Movement Detection | Optical |
Closest rivals on specs
ELECOM Huge Plus Wireless Trackball Mouse- Item Weight 0.75 vs 0.64 pounds (+17%)
Kensington Orbit Trackball Mouse- Item Weight 0.75 vs 0.6 pounds (+25%)
ELECOM Huge Trackball Mouse- Item Weight 0.75 vs 0.59 pounds (+27%)
Frequently asked questions
How do you install the Kensington Expert Mouse trackball?
It is a wired USB device, so you plug it into a USB port. The four buttons can then be set up in the KensingtonWorks software mentioned in the listing.
Is the Kensington K64325 wireless?
No. The listing gives USB and corded electric power.
Is it for left or right hand use?
It is listed as ambidextrous, and the wrist rest is detachable.
How large is the ball?
The description gives a 55mm ball tracked optically.