---
product_id: 48083633
title: "Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse"
brand: "kensington"
price: "NT$7807"
currency: TWD
in_stock: true
reviews_count: 13
category: "Kensington"
url: https://www.desertcart.tw/products/48083633-kensington-expert-mouse-wired-optical-ergonomic-trackball-mouse
store_origin: TW
region: Taiwan
---

# 55mm precision trackball Scroll ring for effortless navigation Wired USB for lag-free connection Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse

**Brand:** kensington
**Price:** NT$7807
**Availability:** ✅ In Stock

## Summary

> 🎯 Master precision and comfort—scroll, click, and conquer your workflow like a pro!

## Quick Answers

- **What is this?** Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse by kensington
- **How much does it cost?** NT$7807 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/48083633-kensington-expert-mouse-wired-optical-ergonomic-trackball-mouse)

## 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

- • **Reliable Wired Connection:** 180cm USB cable ensures uninterrupted, battery-free performance—no lag, no downtime, just pure efficiency.
- • **Ambidextrous Comfort Design:** Ergonomically crafted for both right and left-handed users, reducing wrist strain during marathon work sessions.
- • **Customizable Workflow Power:** KensingtonWorks software lets you tailor 4 buttons with multi-function commands, boosting productivity with personalized shortcuts.
- • **Precision at Your Fingertips:** DiamondEye optical tracking delivers pixel-perfect cursor control for demanding multitasking and creative workflows.
- • **Effortless Scrolling Experience:** Spin the intuitive scroll ring to breeze through long documents and web pages without lifting a finger.

## Overview

The Kensington Expert Mouse is a wired ergonomic trackball designed for PC and Mac users seeking precision and comfort. Featuring a large 55mm spherical ball with DiamondEye optical tracking, an ambidextrous design, and a scroll ring for smooth navigation, it enhances productivity while reducing wrist strain. Customizable via KensingtonWorks software, its 4 programmable buttons adapt to your workflow. The reliable wired USB connection eliminates battery worries, making it a durable, professional-grade input device favored by creatives and managers alike.

## 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.

Review: I absolutely love it! - UPDATE 24 FEB 2011 Here is an update to my original review. I just as keen on this excellent input device as I was a year ago when I bought it. It has been in constant use and it really is imho the best input device I have ever used. I use it for graphics, mostly in Adobe Illustrator for example and there is so much control and it is precise. Equally it can go very quickly across screens so I can get across my two screens easily. I also use it for editing video in Final Cut Pro and here, it is really superb. It's great big trackball makes it very easy to just creep forward and back a frame at a time. I really do think that people may overlook this terrific input device because it is not slick and cool, but it is very much the best possible thing for the job. My only comment that could be negative, but isn't, is that using it exclusively may risk RSI problems with you shoulder. I think this is true of any mouse of this sort. That is why I also use the Contour RollerMouse Free. This I use for scrolling around word processing documents and that kind of thing. ORIGINAL REVIEW MARCH 2010 I bought mine on 30 January so I've had it for six weeks now. I absolutely love it! I do not use it exclusively, I use it in conjunction with a Contour RollerMouse Free. However I use the Kensington Expert Mouse for graphics. I recently just finished doing a lot of editing of a video with Final Cut Express and the Expert Mouse is superb for this kind of thing. Many years ago I used a Kensington trackball, I think in about 1995, and I really like that one, but this is so much better because it has such a large trackball. The negative things about this trackball are that it feels a bit cheap in construction compared with say, a Logitech or Microsoft mouse at this price, however I think it is well constructed nevertheless. It looks rather 70s to me but I don't mind this. In actual use the feel is very good. The scroll wheel bearing surface is noisy in a plasticy way but there is no problem with this in use. From time to time it is a good idea to remove a build up of gunge on the three little ball bearings. I keep an old toothbrush nearby for this purpose. It's also quite good to take the ball out and polish it, perhaps with your shirt :) Any of these small negatives are hugely outweighed by the fact that the level of control over the cursor is superb. That is what an input device like this is for and that is what it does so well. Before I got this I tried the most expensive Logitech mouse, however the software for that on my Mac was a disaster so I had to send it back. IMHO the Kensington Expert Mouse is a far better buy than that more expensive Logitech mouse. The level of control over the cursor is much better. The software for the Kensington Expert Mouse works very well indeed on my Mac. I use it with the default settings and it is fine. The scroll direction can be switched with a menu in the menu bar at the top of the Mac OS screen and this is very handy. If you buy this you will be initially disappointed when you take it out of the packaging. You will think it is a prop from the Star Wars movie. When you first use it you will think it is a bit weird if you have not used a trackball before. You will still be having doubts. After a week of using it you will never want to use a "normal" mouse again!
Review: Who'd spend this much on this heap of plastic? ...read on - After having used the left/right-handed Logitech Marble Mouse pretty happily for six years why has this monster just become my new best friend? The snooker sized ball is massive and comfortable. It sits very well right next to the keyboard, the wrist rest encourages a very natural and ergonomic sitting position. The Logitech's design always had me wanting to be able to incline it sideways off the desk at an angle. Most of Logitech's right-handed-only models do cradle the hand at a slight angle. The ambidextrous model however doesn't. Presumably this is so they can flog more of these units to both left and right handers rather than simply make just ONE of their products for lefties, ok, rant over. The Kensington's large ball allows you to alter the angle at which your hand sits, as a far larger area of your fingers makes contact with the ball. A lot of other reviewers of this product on other sites say a great deal about the hardware so there's no point re-hashing that here other than to agree it does feel a bit on the cheap and plasticy side, but that said personally, I'd much rather something that's well made and works well than something that just looks good. The hardware is however only part of the story. It's the software that comes bundled with this that really makes the difference. You can easily program each of the 4 buttons and assign functions both the top two buttons and the bottom two buttons being pressed simultaneously too which effectively increases the number of buttons to six. The functions you can ascribe these buttons is extremely impressive, things I'd never have thought of as mouse functions. One click can bring up a really nifty `alt-tab' alternative. You can program any button to emulate any keyboard presses, so anything from entering a string of text to say Windows-D-ing or Windows-E-ing. You can even create your own right click menus. The mouse buttons can also be told to function differently within different programs. I've only just started using this but I knew in an instant that this is a really nice bit of kit.

## 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 | 4,240 in PC & Video Games ( See Top 100 in PC & Video Games ) 13 in Trackballs 377 in PlayStation Legacy Systems |
| 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 4,128 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 |
| Included Components | Detachable Wrist Rest, Kensington Trackball 4-Button Usb Expert Mouse |
| 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

![Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse - Image 1](https://m.media-amazon.com/images/I/51-OPm54iKL.jpg)
![Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse - Image 2](https://m.media-amazon.com/images/I/71aFhXOisxL.jpg)
![Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse - Image 3](https://m.media-amazon.com/images/I/71VEXYlsNML.jpg)
![Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse - Image 4](https://m.media-amazon.com/images/I/61uJ+jSB+jL.jpg)
![Kensington Expert Mouse - Wired Optical Ergonomic Trackball Mouse - 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ I absolutely love it!
*by B***E on 23 March 2010*

UPDATE 24 FEB 2011 Here is an update to my original review. I just as keen on this excellent input device as I was a year ago when I bought it. It has been in constant use and it really is imho the best input device I have ever used. I use it for graphics, mostly in Adobe Illustrator for example and there is so much control and it is precise. Equally it can go very quickly across screens so I can get across my two screens easily. I also use it for editing video in Final Cut Pro and here, it is really superb. It's great big trackball makes it very easy to just creep forward and back a frame at a time. I really do think that people may overlook this terrific input device because it is not slick and cool, but it is very much the best possible thing for the job. My only comment that could be negative, but isn't, is that using it exclusively may risk RSI problems with you shoulder. I think this is true of any mouse of this sort. That is why I also use the Contour RollerMouse Free. This I use for scrolling around word processing documents and that kind of thing. ORIGINAL REVIEW MARCH 2010 I bought mine on 30 January so I've had it for six weeks now. I absolutely love it! I do not use it exclusively, I use it in conjunction with a Contour RollerMouse Free. However I use the Kensington Expert Mouse for graphics. I recently just finished doing a lot of editing of a video with Final Cut Express and the Expert Mouse is superb for this kind of thing. Many years ago I used a Kensington trackball, I think in about 1995, and I really like that one, but this is so much better because it has such a large trackball. The negative things about this trackball are that it feels a bit cheap in construction compared with say, a Logitech or Microsoft mouse at this price, however I think it is well constructed nevertheless. It looks rather 70s to me but I don't mind this. In actual use the feel is very good. The scroll wheel bearing surface is noisy in a plasticy way but there is no problem with this in use. From time to time it is a good idea to remove a build up of gunge on the three little ball bearings. I keep an old toothbrush nearby for this purpose. It's also quite good to take the ball out and polish it, perhaps with your shirt :) Any of these small negatives are hugely outweighed by the fact that the level of control over the cursor is superb. That is what an input device like this is for and that is what it does so well. Before I got this I tried the most expensive Logitech mouse, however the software for that on my Mac was a disaster so I had to send it back. IMHO the Kensington Expert Mouse is a far better buy than that more expensive Logitech mouse. The level of control over the cursor is much better. The software for the Kensington Expert Mouse works very well indeed on my Mac. I use it with the default settings and it is fine. The scroll direction can be switched with a menu in the menu bar at the top of the Mac OS screen and this is very handy. If you buy this you will be initially disappointed when you take it out of the packaging. You will think it is a prop from the Star Wars movie. When you first use it you will think it is a bit weird if you have not used a trackball before. You will still be having doubts. After a week of using it you will never want to use a "normal" mouse again!

### ⭐⭐⭐⭐⭐ Who'd spend this much on this heap of plastic? ...read on
*by A***D on 28 July 2006*

After having used the left/right-handed Logitech Marble Mouse pretty happily for six years why has this monster just become my new best friend? The snooker sized ball is massive and comfortable. It sits very well right next to the keyboard, the wrist rest encourages a very natural and ergonomic sitting position. The Logitech's design always had me wanting to be able to incline it sideways off the desk at an angle. Most of Logitech's right-handed-only models do cradle the hand at a slight angle. The ambidextrous model however doesn't. Presumably this is so they can flog more of these units to both left and right handers rather than simply make just ONE of their products for lefties, ok, rant over. The Kensington's large ball allows you to alter the angle at which your hand sits, as a far larger area of your fingers makes contact with the ball. A lot of other reviewers of this product on other sites say a great deal about the hardware so there's no point re-hashing that here other than to agree it does feel a bit on the cheap and plasticy side, but that said personally, I'd much rather something that's well made and works well than something that just looks good. The hardware is however only part of the story. It's the software that comes bundled with this that really makes the difference. You can easily program each of the 4 buttons and assign functions both the top two buttons and the bottom two buttons being pressed simultaneously too which effectively increases the number of buttons to six. The functions you can ascribe these buttons is extremely impressive, things I'd never have thought of as mouse functions. One click can bring up a really nifty `alt-tab' alternative. You can program any button to emulate any keyboard presses, so anything from entering a string of text to say Windows-D-ing or Windows-E-ing. You can even create your own right click menus. The mouse buttons can also be told to function differently within different programs. I've only just started using this but I knew in an instant that this is a really nice bit of kit.

### ⭐⭐⭐⭐ Still the best on the market, but a downgrade from the earlier version with mag-notches
*by M***N on 5 July 2026*

I like it, but this latest version has its flaws. Kensington has upgraded the mousewheel sensor array I believe, and so unlike the older version circa 2020, this latest edition has smooth mousewheel motion. This sounds like it ought to be a good thing, but I've found it to be far too twitchy in general use as I tend to rest my fingers on the mousewheel. The lightest touch and the smallest motion triggers the wheel, and so you end up scrolling unnecessarily which is quite annoying. I've gotten around it following a conversation with ChatGPT which advised me to download a scripting engine called "Hotkeys" and helped me put together a script that forces a dead zone on the wheel. This is an improvement, but I shouldn't have had to do this (the magnetic notch version was far superior as it gave a natural resistance to motion and introduced the dead zone mechanically). The other issue relates to any removal of the ball to clean it. This has to be done with the power off, otherwise when the ball goes back it ruins the calibration and motion is erratic until the device is unplugged and plugged back in again. Finally, there's some sort of firmware-level eco-saving going on, which after only a few seconds of no motion causes the mouse to go into a lower power mode (you can see this if you keep your eye on the red sensor if you can see it from the right angle - it goes from steady state to blinking). Moving the mouse again triggers it to go back into full power mode, but this also introduced a very small, but measurable, level of latency. On a 4K screen, this manifests as about a 1% distance delay of the screen size. Again, doesn't sound like much, but on a 30" monitor, this is about 1/4" of motion, which is quite a distance before the mouse moves. I'm keeping the device because I've learned to live with these flaws, but it's a real shame Kensington have effectively ruined many of the things I loved about the original.

## 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 Taiwan*
*Store origin: TW*
*Last updated: 2026-08-14*