---
product_id: 255823830
title: "Expert"
brand: "kensington"
price: "S$157"
currency: SGD
in_stock: null
reviews_count: 7
category: "Kensington"
url: https://www.desertcart.sg/products/255823830-expert
store_origin: SG
region: Singapore
---

# Patented scroll ring 55mm large precision ball Ergonomic detachable wrist rest Expert

**Brand:** kensington
**Price:** S$157
**Availability:** ❌ Out of Stock

## Summary

> 🖱️ Elevate your desk game with precision and comfort that commands attention.

## Quick Answers

- **What is this?** Expert by kensington
- **How much does it cost?** S$157 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/255823830-expert)

## 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

- • **Tailor Your Workflow:** Customizable 4-button layout and adjustable scroll/cursor speeds via KensingtonWorks software put you in full control.
- • **Plug & Play Reliability:** Wired USB-A connection guarantees lag-free, stable performance—no batteries, no interruptions.
- • **Precision at Your Fingertips:** Large 55mm Diamond Eye optical ball ensures pixel-perfect cursor control for demanding workflows.
- • **Seamless Scrolling Experience:** Patented scroll ring lets you glide through documents and web pages effortlessly—no more endless wheel spinning.
- • **All-Day Comfort, Ambidextrous Design:** Detachable ergonomic wrist rest supports your hand and wrist, reducing fatigue during marathon work sessions.

## Overview

The Kensington Expert Trackball Mouse (K64325) combines a large 55mm Diamond Eye optical ball with a patented scroll ring and ergonomic detachable wrist rest to deliver precise cursor control and all-day comfort. Its ambidextrous design and customizable 4-button layout, adjustable via KensingtonWorks software, make it a versatile tool for professionals seeking enhanced productivity. Wired USB-A connectivity ensures reliable, lag-free performance compatible with Windows and macOS systems.

## Description

Buy Kensington Expert Trackball Mouse (K64325), Black Silver, 5"W x 5-3/4"D x 2-1/2"H online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: My choice - Recommend for people who know how to use this track ball
Review: Comfortable and productive - Took me a while to decide to opt for such a different style of mouse but it’s made a big difference not only to my personal comfort when working for long hours, but also to my work flow, and was surprisingly easy to get used to.

## 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 *KensingtonWorks 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 KensingtonWorks.
- Wired USB-A connection for reliable connectivity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00009KH63 |
| Additional Features | Ergonomic Design |
| Antenna Location | Office |
| Are Batteries Included | Yes |
| Are Batteries Required | Yes |
| Battery Average Life | 12 months |
| Best Sellers Rank | #19,258 in Computers ( See Top 100 in Computers ) #3 in Computer Trackballs |
| Brand | Kensington |
| Built-In Media | Detachable Wrist Rest, Kensington Trackball 4-Button Usb Expert Mouse |
| Button Quantity | 3 |
| Color | Black Silver |
| 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 |
| Connectivity technology | USB |
| Customer Reviews | 4.2 out of 5 stars 18,182 Reviews |
| Embellishment Feature | Crystal |
| Enclosure Material | Plastic |
| Finish | Matte |
| Global Trade Identification Number | 00085896643258, 50085896643253 |
| Hand Orientation | Ambidextrous |
| Hardware Platform | PC |
| Item Dimensions L x W | 24.8L x 8.9W centimeters |
| 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 |
| Model Name | K64325 |
| Model Number | 64325 |
| Movement Detection | Optical |
| Movement detection technology | Optical |
| Number of Batteries | 1 12V batteries required. (included) |
| Number of buttons | 3 |
| Operating System | Windows 10, Windows 7 |
| Power Source | Corded Electric |
| Range | 180 centimeters |
| Special features | Ergonomic Design |
| Style Name | Wired |
| Theme | Office |
| UPC | 638458744902 085896643258 809385141014 666669843022 803982736673 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Kensington
- **Colour:** Black Silver
- **Connectivity technology:** USB
- **Movement detection technology:** Optical
- **Special features:** Ergonomic Design

## Images

![Expert - Image 1](https://m.media-amazon.com/images/I/51-OPm54iKL.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

### ⭐⭐⭐⭐⭐ My choice
*by R***S on 4 April 2024*

Recommend for people who know how to use this track ball

### ⭐⭐⭐⭐⭐ Comfortable and productive
*by T***M on 5 July 2021*

Took me a while to decide to opt for such a different style of mouse but it’s made a big difference not only to my personal comfort when working for long hours, but also to my work flow, and was surprisingly easy to get used to.

### ⭐⭐⭐ Go for Kensington Orbit
*by A***R on 6 February 2026*

The Kensington Orbit is far better than the Kensington Expert. Over the last two years, I have encountered many performance issues with the Kensington Expert, mainly with the ring.

## 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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**Shop now:** [https://www.desertcart.sg/products/255823830-expert](https://www.desertcart.sg/products/255823830-expert)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-08*