---
product_id: 726845564
title: "Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325"
brand: "kensington"
price: "$197.57"
currency: USD
in_stock: true
reviews_count: 8
category: "Kensington"
url: https://www.desertcart.us/products/726845564-kensington-expert-mouse-optical-usb-trackball-for-pc-or-mac
store_origin: US
region: United States of America
---

# DiamondEye optical tracking for pinpoint accuracy Award-winning scroll ring for smooth navigation Large trackball for effortless precision control Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325

**Brand:** kensington
**Price:** $197.57
**Availability:** ✅ In Stock

## Summary

> 🎯 Own your workspace with precision and comfort — the Expert Mouse way.

## Quick Answers

- **What is this?** Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 by kensington
- **How much does it cost?** $197.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/726845564-kensington-expert-mouse-optical-usb-trackball-for-pc-or-mac)

## 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

- • **Built to Last:** Robust cable design and premium build quality engineered for professional-grade durability.
- • **Ergonomic Mastery:** Generous large ball and removable wrist rest ensure all-day comfort and reduce fatigue.
- • **Effortless Scrolling:** Innovative scroll ring offers intuitive, precise scrolling without lifting your hand.
- • **Seamless Compatibility:** Plug-and-play USB and PS/2 support for both Windows and Mac environments.
- • **Precision at Your Fingertips:** DiamondEye optical sensor delivers unmatched tracking accuracy for flawless workflow.

## Overview

The Kensington Expert Mouse Optical USB Trackball 64325 combines advanced DiamondEye optical tracking with a large, ergonomic ball and an award-winning scroll ring, delivering superior accuracy and comfort. Compatible with both USB and PS/2 interfaces across Windows and Mac systems, it features a removable wrist rest for customizable support, making it a top choice for professionals seeking productivity and style in one sleek device.

## Description

Marketing Information: The 7th generation of Expert Mouse Optical. It features precise DiamondEye optical tracking, a large ball for maneuverability, an innovative scroll ring, and a removable wrist rest that comfortably supports your wrist. Supports USB and PS/2 Windows 98 or later, Mac OS X or later Brand Name: Kensington Manufacturer: ACCO Brands Corporation Manufacturer Part Number: 64325 Package Quantity: 1 Product Name: Expert Mouse Trackball - USB PS2 Adapter Product Series: Expert Mouse Product Type: -Trackball. Pointing Device Host Interface: USB Pointing Device Host Interface: PS/2 Additional Information: DiamondEye optical tracking for superior accuracy Award Winning Scroll Ring - Accurate scrolling at your fingertips. Superior comfort and ultimate productivity. Large ball for maximum precision and control Removable wrist rest for comfortable hand support Assembly Required: No Country of Manufacture: China Supported Devices: Computer Package Includes: Wrist Rest Post-Consumer Waste(%): 0% Recycled: No Recycled Content: 0% System Requirements: Windows 98 or later computers with USB or PS2 ports. Mac OS X or later with USB port Internet connection or CDROM to install the software. Color: Black Color: Silver Depth: 5.8" Height: 2.5" Width: 5" Motion Detection: Optical Pointing device cable length: 6 feet Pointing Device Connectivity Technology: Cable -

Review: もはや人生の伴侶 - 音楽仕事にはデフォルト。ソフトの挙動が時々怪しい。専用アプリ化してもらいたい。
Review: 使い易いです☆ - なりがちょっとデカいですが、とても使い易いです☆ ボタンの位置も押し易いし、手も手首も疲れません☆

## Features

- Kensington 64325 Expert Mouse Trackball - USB with PS2 Adapter - Optical - Cable - Black Silver - USB PS/2
- Kensington 64325

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00009KH63 |
| Amazon Bestseller | #137,167 in Computers ( See Top 100 in Computers ) #2,408 in Computer Mice |
| Are Batteries Included | Yes |
| Batteries | 1 12V batteries required. (included) |
| Brand | Kensington |
| Color | Black, Silver |
| Computer Memory Type | DDR3 SDRAM |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,014) |
| Date First Available | November 4, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 335 g |
| Item dimensions W x H | 8.9 x 24.8 x 24.8 cm |
| Item model number | 64325 |
| Manufacturer | ElectricalLand |
| Number of USB 2.0 Ports | 1 |
| Operating System | Windows 98 |
| Processor Count | 1 |
| Product Dimensions | 8.89 x 24.77 x 24.77 cm; 335 g |
| Series | Expert Mouse |
| Voltage | 1 Volts |
| Wireless Type | 2.4 GHz Radio Frequency, 802.11abg |

## Product Details

- **Brand:** Kensington
- **Color:** Black, Silver
- **Connectivity Technology:** USB
- **Movement Detection Technology:** Trackball
- **Special Feature:** Wrist Rest

## Images

![Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 - Image 1](https://m.media-amazon.com/images/I/51-OPm54iKL.jpg)
![Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 - Image 2](https://m.media-amazon.com/images/I/71VEXYlsNML.jpg)
![Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 - Image 3](https://m.media-amazon.com/images/I/71ytB6AAY8L.jpg)
![Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 - Image 4](https://m.media-amazon.com/images/I/61uJ+jSB+jL.jpg)
![Kensington Expert Mouse Optical USB Trackball for PC or Mac 64325 - Image 5](https://m.media-amazon.com/images/I/71SUOaNWV1L.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

### ⭐⭐⭐⭐⭐ もはや人生の伴侶
*by T***S on October 17, 2025*

音楽仕事にはデフォルト。ソフトの挙動が時々怪しい。専用アプリ化してもらいたい。

### ⭐⭐⭐⭐⭐ 使い易いです☆
*by ｸ***ﾙ on January 26, 2015*

なりがちょっとデカいですが、とても使い易いです☆ ボタンの位置も押し易いし、手も手首も疲れません☆

### ⭐⭐⭐⭐⭐ でかい、ごつい、使いやい
*by 弓***路 on October 25, 2013*

M570を購入したのですが、親指トラックボールがどうしても馴染めず、評判の良かったこれを購入しました。 大きなボールをごろごろ転がすのはとても楽しく、また身体への負担の小さくなりました。 マウスからトラックボールへと変更した操作性の問題ですが、直ぐに慣れることができました。 これはオススメです。 《特に良いところ》 安定感が高く、本体が動くことがほとんどない。 ボールが大きく、また回転がとてもスムーズ、回しやい。 《気になったところ》 ホイールの作りが甘く、スムーズに回転しない。 センサーが上を向いているため、埃入りが心配。底に穴も無いためメンテナンスは少し面倒。

## 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 States of America*
*Store origin: US*
*Last updated: 2026-03-17*