---
product_id: 48083633
title: "Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325)"
brand: "kensington"
price: "£139.17"
currency: GBP
in_stock: true
category: "Kensington"
url: https://www.desertcart.co.uk/products/48083633-expert-mouse-wired-ergonomic-trackball-mouse-for-pc-mac-windows
store_origin: GB
region: United Kingdom
---

# 55mm precision ball Scroll ring for smooth navigation Wired USB for lag-free control Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325)

**Brand:** kensington
**Price:** £139.17
**Availability:** ✅ In Stock

## Summary

> 🎯 Master your workspace with precision and comfort — the Expert Mouse means business.

## Quick Answers

- **What is this?** Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) by kensington
- **How much does it cost?** £139.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/48083633-expert-mouse-wired-ergonomic-trackball-mouse-for-pc-mac-windows)

## Best For

- kensington enthusiasts

## Why This Product

- Trusted kensington brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ambidextrous Comfort:** Ergonomic design and detachable wrist rest cradle both left and right hands for all-day productivity.
- • **Effortless Scrolling:** Spin the intuitive scroll ring to breeze through documents and web pages without lifting a finger.
- • **Custom Command Center:** KensingtonWorks software lets you personalize 4 buttons with multi-function macros tailored to your workflow.
- • **Plug & Play Reliability:** Wired USB connection ensures zero lag and no battery hassles—just consistent performance every time.
- • **Precision at Your Fingertips:** DiamondEye optical tracking delivers pixel-perfect cursor control for demanding multitaskers.

## Overview

The Kensington Expert Mouse is a wired ergonomic trackball designed for PC and Mac users seeking superior precision and comfort. Featuring a large 55mm perfectly spherical ball with DiamondEye optical tracking, a smooth scroll ring, and an ambidextrous design with detachable wrist rest, it reduces hand movement and wrist strain. Customizable via KensingtonWorks software, its 4 programmable buttons enhance productivity. The reliable 180cm wired USB connection eliminates lag and battery concerns, making it a top choice for professionals aiming to elevate their workflow.

## Description

From the manufacturer Kensington Expert Wired Trackball Mouse The Optimal Trackball The Expert Mouse Wired Trackball is the productivity enhancer professionals use to get more work done in less time. It offers highly accurate cursor control & great comfort for your hand & wrist. KensingtonWorks software can customise the 4 buttons, plus our Scroll Ring lets you quickly scan up & down your screen. Get the Ball Rolling Better comfort means more productivity. For years, graphic designers, music producers & many others have enjoyed the comfort & productivity that trackballs deliver. Now you can too. Offering better ergonomics with less wrist & hand movement, the design provides a familiar user experience for mouse converts. Key Features Compatible with Windows 8.1/8.0/7/10 and Mac OS 10.8 or later Large 55mm ball is designed as a perfect sphere to provide exceptional precision Ambidextrous design works equally well for both right-handed and left-handed users DiamondEye optical tracking technology for premium cursor control and accuracy Plug & Play installation via wired USB connection DiamondEye Optical Tracking & Scroll Ring Movement detection technology provides smooth, precise cursor control so you can navigate the screen with less hand movement. Spin the dial to scroll web pages or documents with complete ease. Personalise Buttons via KensingtonWorks Software KensingtonWorks provides an even more personalized experience, giving you the ability to assign a variety of program functions to each of the buttons, as well as adjusting cursor and scrolling speeds. Ambidextrous Design with Ergonomic Comfort The ambidextrous design works equally well for right & left handed users while taking up less desk space. The detachable wrist rest supports hand and wrist for ergonomic comfort. Wired USB Connection Provides a direct and reliable connection for continuous performance and eliminates the need for batteries.

## Features

- KensingtonWorks Customization - Free downloadable software provides an even more personalized experience, giving you the ability to assign a wide variety of program functions to each of the 4 buttons, as well as controlling the pointer speed and scrolling speed
- DiamondEye Optical Tracking - Movement detection technology provides smooth, precise cursor control so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency
- Scroll Ring and Large Ball - Spin the dial to move up and down web pages or documents with complete ease while the grey ball has been specially designed with an absolute spherical, hard surface for precise tracking and control
- Ambidextrous Design - Works equally well for both right-handed and left-handed users to get the most out of their trackball
- Detachable Wrist Rest - Soft cushioning cradles the hand and wrist in ergonomic comfort for pain-free productivity during extended periods of activity on the computer
- Reliable wired USB connection - Wired 180 cm USB cable provides reliability and avoids need for batteries
- PC and Mac compatible - Mac running OS X or later with an available USB Port. Internet connections or CD ROM drives to install the software. Compatible with Windows 7, Windows XP, Windows Vi

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00009KH63 |
| Antenna Location | Office |
| Are Batteries Included? | Yes |
| Are Batteries Required | Yes |
| Best Sellers Rank | 3,960 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 2 in Trackballs 343 in PlayStation Legacy Systems |
| Box Contents | Detachable Wrist Rest, Kensington Trackball 4-Button Usb Expert Mouse |
| Brand | Kensington |
| Brand Name | Kensington |
| Button Quantity | 3 |
| Colour | Black Silver |
| Compatible Devices | Windows 7, Windows 8, Windows 8.1, macOS 10.8, Windows 10, macOS X 10.11, macOS 10.10 or above, Chrome OS 44 or above, macOS 10.9, macOS Sierra 10.12, macOS 10.13 or above |
| Connectivity technology | USB |
| Customer Reviews | 4.3 out of 5 stars 4,102 Reviews |
| EU Spare Part Availability Duration | 5 Years |
| Embellishment Feature | Crystal |
| Enclosure Material | Plastic |
| Global Trade Identification Number | 00085896643258, 50085896643253 |
| Hand Orientation | Ambidextrous |
| Hardware Platform | PC |
| Item Dimensions L x W | 8.9L x 24.8W centimetres |
| Item Part Number | 64325 |
| Item Type Name | Kensington Expert Mouse® - Wired Optical Ergonomic Trackball Mouse with Scroll Ring, Compatible with Windows & macOS - Space Grey (64325) |
| Item Weight | 0.34 Kilograms |
| Manufacturer | Kensington |
| Manufacturer Part Number | 64325 |
| Minimum Required Operating System Version | Windows 7 |
| Model Name | Expert Mouse Optical Wired USB Trackball for PC and Mac - Silver and Black |
| Model Number | 64325 |
| Movement Detection | Optical, Trackball |
| Movement detection technology | Optical , Trackball |
| Network Connectivity Technology | USB |
| Number of Batteries | 1 12V batteries required. (included) |
| Number of buttons | 3 |
| Operating System | Windows 10, Windows 7 |
| Pattern | Mouse |
| Power Source | Corded Electric |
| Product Features | Movement detection technology:Trackball |
| Product Finish Type | Matte |
| Product Warranty | 5 years |
| Range | 180 centimeters |
| Special feature | Movement detection technology:Trackball |
| Style Name | Expert Mouse |
| Theme | Office |
| UPC | 638458744902 085896643258 809385141014 666669843022 803982736673 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Kensington
- **Colour:** Black Silver
- **Connectivity technology:** USB
- **Movement detection technology:** Optical, Trackball
- **Special feature:** Movement detection technology:Trackball

## Images

![Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) - Image 1](https://m.media-amazon.com/images/I/51-OPm54iKL.jpg)
![Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) - Image 2](https://m.media-amazon.com/images/I/71aFhXOisxL.jpg)
![Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) - Image 3](https://m.media-amazon.com/images/I/71VEXYlsNML.jpg)
![Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) - Image 4](https://m.media-amazon.com/images/I/61uJ+jSB+jL.jpg)
![Expert Mouse - Wired Ergonomic TrackBall Mouse for PC, Mac and Windows with Scroll Ring, Ambidextrous Design and Optical Tracking - Grey (64325) - Image 5](https://m.media-amazon.com/images/I/71ytB6AAY8L.jpg)

## Questions & Answers

**Q: Does it work on Linux?**
A: Yes. I’ve used this trackball with 5 different releases of Linux Mint going back some years. All 4 buttons will work, but you will have to monkey with your desktop environment to map them to what you want.

**Q: does left click result in double click after use?**
A: I have a Kensington "Mouse Port/Serial" version (RS232 "COM" Serial or PS/2) Expert Mouse trackball (from the mid 90's) that I bought new all those years ago when I built my Intel 486 DX2-66 PC (66Mhz = 0.066Ghz) and have been using for hours and hours every day on each PC upgrade I've built ever since (currently a i7-4790K !), including audio editing, gaming, web browsing, and more...  I still have the original box which says "OS2 Warp" and "Works with Windows 95 and Windows 3.1" and "5 Year Warranty" on it (yes, it's really THAT old!) and all these years later I'm now using it on a 4.0Ghz quad-core PC running Windows 10 Pro x64 with no problems whatsoever! Even after pounding hard on the bottom left button for gaming year after year it just took the abuse and kept on working fine. After about 15 years of that abuse along with lots of hard pressure holding of that same bottom left button for selecting audio segments, manually scrolling through documents and web pages, and so on, it began occasionally either releasing or double-clicking during selecting of audio segments as if I'd released the button when I had not, BUT after sitting overnight it always goes back to normal and doesn't act up like that unless I start doing lots of heavy thumb action with bottom left button holding or pounding again. If I remember to go a little easier on the pressing or don't do a ton of left button holds it can go for weeks before the bottom left button gets quirky again. Also note that it's literally 20 years old, it's been doing that off and on for about a decade now, and it has never been anywhere near as intermittent and downright useless as the Logitech buttons become in less than a year with comparable use. We have Logitech trackballs at work and after the third replacement batch in 2 years they've learned to live with the flaky buttons because the boss feels that $25-$40 for a mouse is absurd and he definitely won't spend the money to buy Kensington trackballs... I'm actually about to replace my 20 year old Kensington Expert Mouse with the new model, only because I need a KVM, my back-lit keyboard is "USB only" (PS/2 Support), USB didn't exist when I bought my now 20 year old Serial/PS-2 Expert Mouse, and although I have successfully gotten its' signals to convert to USB through a (RS-232 COM Port) "Serial to USB interface" and also got a PS/2 to USB keyboard/mouse signal converter dongle to work with it I haven't been able to successfully get either of those converted USB signals to pass through a USB KVM...I started to look for other ways to adapt PS/2 or Serial to USB that claimed to be KVM compatible but I couldn't find a workable solution that would pass through a USB KVM for less than the cost of a brand new Kensington USB Expert Mouse so sadly I think my 20 year old Expert Mouse is about to be retired and an new USB one will finally be taking its' place soon. I hope the quality of today's Kensington Expert Mouse is as good as they were 20 years ago. Time will tell... Also note that my 20 year old Expert Mouse that still works very well uses 2 giant wide metal rollers for the X and Y axis motion detection (that the ball rests on) with photo-led sensor wheels inside to generate the X/Y mouse movement signals, basically over-sized industrial grade versions of the small plastic roller rods the old rubber ball mice used to use (which had to be cleaned when the cursor started getting stuck and I need to clean these maybe once every 3-4 years at the most), unlike the much newer mouse technology of the past decade that uses optical detectors to actually look at the ball and see it move. As a comparison, Logitech once offered a big track ball mouse for a while that looked almost identical to the Kensington Expert Mouse for less than half the price and when I lifted the ball out to check out the rollers it was immediately obvious why the price was so much less.  They were tiny rollers just like you'd find inside a cheap old ball mouse! So 20 years ago you got what you paid for, and even 10 years ago it was obvious that the Kensington products were still vastly superior in quality to their competition and based on the reviews here that still seems to be the case.

**Q: Can the Expert side scroll?  I use spreadsheets that are really wide and have a lot of columns and need that feature.**
A: Even better than holding the SHIFT key, you can scroll horizontally ONE-HANDED: Assign one of the additional buttons to activate the SHIFT key using the included KENSINGTON TRACKBALL WORKS software. I recommend using the button opposite your thumb so you can use your thumb to scroll horizontally. So, for those RIGHT-handed assign SHIFT to the TOP RIGHT button, for LEFT-handed assign SHIFT to the TOP LEFT button. This works on Windows and Mac OS X.More Info: http://www.kensington.com/us/us/6498/trackballworks%e2%84%a2-customization-software

**Q: Does the scroll ring on this mouse have clicks that you can feel while scrolling - when scrolling through a set of images to be able to know that you**
A: No, I don't know if the people above had a different version of the mouse or something but there are NO clicks on the scroll ring. It scrolls smoothly.

## Frequently Bought Together

- Kensington Expert Trackball Mouse (K64325), Black Silver, 5"W x 5-3/4"D x 2-1/2"H
- Kensington Orbit Trackball Mouse with Scroll Ring (K75327WW), Black-Grey
- Kensington Pro Fit Ergonomic Wired Keyboard- Black (K75400US)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-07-19*