Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8" | Large ergonomic trackball, wireless connection, 3.5 x 6.1 x 8 in, reduces wrist strain

Name: Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8" | Large ergonomic trackball, wireless connection, 3.5 x 6.1 x 8 in
Brand: Unbranded
SKU: B01936N73I
Price: 90.35 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-23

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$90.35

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*Price sourced from Amazon.com. Last updated 2026-08-24. Price and availability subject to change.

Bottom line: The Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8" | Large ergonomic trackball, wireless connection, 3.5 x 6.1 x 8 in, reduces wrist strain is a specs-and-price decision rather than a crowd-consensus one in the keyboards & mice category, priced around $90.35. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

Pros & Cons

Pros

✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

The Kensington Expert Wireless Trackball Mouse (K72359WW) puts a 55mm ball and Diamond Eye optical tracking under your fingertips, so cursor moves come from your fingers instead of your whole arm. That matters if desk space is tight or wrist strain is a daily problem: the trackball stays put while you work, and the detachable ergonomic wrist rest supports your hand through long sessions. The patented Scroll Ring circles the ball for fast scanning through long documents and web pages, and the ambidextrous 3.5 x 6.1 x 8 inch body works equally well for left- or right-handed users. You get two…

SpecPicks Verdict

SpecPicks scored Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis 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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Frequently Asked Questions

Does the Kensington Expert trackball work without the USB dongle?

Yes. It pairs over built-in Bluetooth LE, which frees a USB port. Kensington recommends Bluetooth for Windows 8.1 or later and Mac OS X 10.8 or later, and the 2.4GHz dongle for Windows 7 or later.

Is it left-handed friendly?

Yes. The body is ambidextrous, so the 55mm ball and Scroll Ring sit centered for either hand, and the detachable wrist rest attaches the same way regardless of which hand you use.

How big is it and how much desk space do I need?

It measures 3.5 x 6.1 x 8 inches. Because you roll the ball instead of sliding the unit, it stays in one spot, so you only need the footprint itself, not swing room.

Can I remap the buttons?

Yes. KensingtonKonnect software customizes the 4-button layout plus scroll speed and cursor speed. Note that Windows ARM-based computers are not currently supported.

What operating systems and warranty does it come with?

It supports Windows, macOS 10.14 and later, and Chrome OS 44 and later. Kensington includes 3 year coverage and lifetime technical support; check the product listing for current terms.

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
Connects wirelessly via built-in Bluetooth LE or with the USB dongle using 2.4Ghz wireless; Auto-sleep helps conserve battery life; Bluetooth connectivity works best for PC Windows 8.1 or later and Mac OS X 10.8 or later; USB dongle connectivity is recommended for Windows 7 or later
Power saving mode puts mouse to sleep when not in use; power settings can be updated in the KensingtonWorks software
Compatible with Windows, macOS (10.14 and later), and Chrome (OS 44 and later); 3 year coverage and lifetime technical support

Full Specifications

Brand	Kensington
Color	Black
Range	feet
Theme	Computer
Finish	Smooth Plastic
Pattern	Mouse
Dimensions	3.5 x 6.1 x 8 in
Model Name	Expert Mouse
Style Name	Wireless
Unit Count	1 Count
Connectivity	Bluetooth, USB, 2.4GHz
Model Number	K72359WW
Power Source	Battery Powered
Compatibility	PC, Mac
Item Type Name	Trackball
Button Quantity	4
Connection Type	Wireless
Mfr Part Number	K72359WW
Special Feature	Ergonomic Design, Touch Scroll, Wireless
Antenna Location	Office

Ready to buy?

Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8" | Large ergonomic trackball, wireless connection, 3.5 x 6.1 x 8 in, reduces wrist strain is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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*Price sourced from Amazon.com. Last updated 2026-08-24. Price and availability subject to change.