Kensington Expert Trackball Mouse (K64325), Black Silver, 5"W x 5-3/4"D x 2-1/2"H
Bottom line: The Kensington Expert Trackball Mouse ($58.00 on Amazon as of 2026-10-06): Large 55mm ball with DiamondEye optical tracking for precise cursor control; main trade-off: wired USB-A only, so no Bluetooth or wireless option.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Large 55mm ball with DiamondEye optical tracking for precise cursor control
- ✓ Patented Scroll Ring spins through long pages and documents
- ✓ 4 buttons remappable via KensingtonKonnect software
- ✓ Detachable ergonomic wrist rest supports hand and wrist
- ✓ Ambidextrous shell suits left- and right-handed users
Cons
- ✗ Wired USB-A only, so no Bluetooth or wireless option
- ✗ Windows ARM-based computers are not currently supported
- ✗ ChromeOS gets basic HID only, no KensingtonKonnect customization
- ✗ USB-A plug needs an adapter on USB-C-only laptops
Manufacturer description
The Kensington Expert Trackball Mouse (K64325) trades the mouse for a stationary 55mm ball, so your hand stays put while the cursor moves. DiamondEye optical tracking reads flecks embedded in that oversized ball, which is why cursor placement stays precise at the pixel level in CAD, timeline scrubbing, and photo retouching. The patented Scroll Ring encircles the ball, letting you spin through long documents and web pages without hunting for a wheel. Four buttons are remappable through KensingtonKonnect software, where you can also tune scroll speed and cursor speed independently. The…
SpecPicks Verdict
SpecPicks scored Kensington Expert Trackball Mouse using a rating × review-volume × price-fit model applied to published specs and reviews across the keyboards & mice category. Compare with similarly-priced alternatives in the keyboards & mice category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for keyboards & mice of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How big is the trackball itself?
It uses a large 55mm ball, tracked optically by DiamondEye technology that reads small flecks embedded in the ball surface for smooth cursor movement.
Can I remap the buttons?
Yes. The 4-button design, scroll speed, and cursor speed are all customizable through Kensington's KensingtonKonnect software.
Does it work with Windows on ARM or ChromeOS?
Windows ARM-based computers are not currently supported. ChromeOS gets standard HID trackball functions but cannot be customized through KensingtonKonnect.
Is it wireless or wired?
Wired. It uses a USB-A connection for reliable, latency-free connectivity, so there are no batteries to charge or replace.
Is it comfortable for left-handed users?
Yes, the shell is ambidextrous and the ergonomic wrist rest is detachable, so it can be positioned for either hand.
Key Features
- Large 55mm ball design and Diamond Eye optical tracking for precise cursor control; Patented scroll ring lets you scan up and down pages with ease
- Detachable, ergonomic wrist rest supports hand and wrist for improved comfort; Ambidextrous design
- Customizable 4-button design, scroll speed and cursor speed via *KensingtonKonnect software. *Windows ARM-based computers are currently not supported. Please check back for future updates on compatibility
- ChromeOS user can get HID functions for a trackball but will not be able to customize their device through KensingtonKonnect.
- Wired USB-A connection for reliable connectivity
Full Specifications
| Brand | Kensington |
|---|---|
| Color | Black Silver |
| Range | feet |
| Finish | Matte |
| Pattern | Mouse |
| Model Name | K64325 |
| Style Name | Wired |
| Unit Count | 1.0 Count |
| Connectivity | USB |
| Model Number | 64325 |
| Power Source | Corded Electric |
| Built-In Media | Detachable Wrist Rest, Kensington Trackball 4-Button Usb Expert Mouse |
| Button Quantity | 3 |
| Connection Type | Wired |
| Mfr Part Number | 64325 |
| Special Feature | Ergonomic Design |
| Antenna Location | Office |
| Hand Orientation | Ambidextrous |
| Item Part Number | 64325 |
| Hardware Platform | PC |
Ready to buy?
Kensington Expert Trackball Mouse (K64325), Black Silver, 5"W x 5-3/4"D x 2-1/2"H is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Related Keyboards & Mice
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- How to Build a Windows 98 Retro PC in 2026
- Best Retro Handhelds in 2026 — From $35 to $500
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
- Best 1440p Gaming GPUs in 2026
More reviews from the SpecPicks archive
Browse all reviews →- Best Budget Gaming PC Parts in 2026: A Ryzen + RTX 3060 Build
- Best Home Office Monitor Under $200 (2026)
- What Happened to the LLM Training Data Shortage?
- How to run DeepSeek-R1 32B on Apple M4 Pro
- Logitech Extreme 3D Pro vs DualSense for Flight and Space Sims in 2026
- Can a Raspberry Pi 4 Run the Oomwoo Open-Source Robot Vacuum Brain?
- Best Streaming Setup Bundle in 2026: 5 Picks From Mic to Stream Deck
- Ryzen 7 9800X3D vs 7800X3D upgrade guide
- Asus ProArt PA27USD 27-Inch OLED Review: Color Meets Gaming Speed
- How to Build a $2000 Home AI Rig in 2026: Used RTX 3090 Guide
- SNES Classic vs Raspberry Pi 4 RetroPie: Which Retro Console Wins in 2026?
- Best Gaming Headset for PlayStation 5 Under $80 (2026)
- Ryzen 5 5600G vs Core i7-9700K for a Budget 1080p Gaming Build
- Best NVMe SSD for a Compact Gaming PC: WD_BLACK SN770 in 2026
- llama.cpp vs vLLM for Single-User Local Chat on a 12GB GPU (2026)
- Single vs. Dual Channel Memory: Intel Core Ultra 7 270K
- Best Streaming Gear for New Creators in 2026
- CRT PC Monitors for Retro Gaming: 2026 Buying Guide
- Steam Deck LCD 6TB Man-Cave Setup: Storage & One-Cable Dock
- Hugging Face Says an AI Agent Breached Its Infrastructure
- RTX 5090 vs RTX 4090 — is the Blackwell upgrade worth it?
- Best Used Ryzen CPU for Budget AM4 Gaming Upgrades in 2026
- CompactFlash and IDE-to-USB Adapters for Retro PC Builds in 2026
- Is the KOORUI 27" 4K QD-Mini LED Worth It for RTX 3060 Gaming?
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090