Kensington Expert Mouse Wireless Trackball (K72359WW): A Buy-Once Guide

By Alex Roman · Published 2026-10-26 · Last verified 2026-10-26 · ASIN B01936N73I

Is the Kensington Expert Mouse Wireless worth it for the long haul? Yes, if you have average to large hands, work on Windows or macOS, and want a finger-operated trackball with a real scroll ring: it is the pick for desk workers who want to stop dragging a mouse around, and it beats cheaper small-ball trackballs on ball size and warranty. The Amazon US listing for the Wireless version (ASIN B01936N73I) showed $90.35, in stock, checked on October 26, 2026 for a New York delivery address, with 4.2 out of 5 from 5,431 ratings. Kensington covers it with a limited 3-year warranty. Skip it if you use Linux, have small hands, or hate AA batteries. We have not used this trackball ourselves; this guide is built from the listing, Kensington's own pages and outside reviews.

Check the Expert Mouse Wireless on Amazon (US)

Illustration of a hand resting on a large black trackball with a red ball on a home-office desk beside a keyboard, laptop and padded wrist rest — Illustration (not a product photo): who the Expert Mouse Wireless suits: desk workers with average to larger hands who want a 55 mm finger-operated ball, a scroll ring and a detachable wrist rest. Wireless version $90.35 on Amazon US, checked October 26, 2026; a wired style was listed separately at $62.99.

Choose this if, or choose another trackball if

Choose the Expert Mouse Wireless if you want a big 55 mm ball moved by your fingers, a ring you spin to scroll, both Bluetooth and a 2.4 GHz receiver, and a 3-year warranty, all for about $90.
Choose the wired Expert Mouse if the trackball never leaves one desk. The listing showed that style at $62.99 on October 26, 2026, with no batteries or pairing to deal with.
Choose the Kensington SlimBlade Pro if you want a rechargeable battery and a lower profile. Kensington says it charges over USB-C, lasts about four months per charge and scrolls by twisting the ball; the Amazon listing comparison showed it at $109.99.
Choose the Kensington Orbit Wireless if you have smaller hands or a tighter budget. Kensington lists a 40 mm ball, a scroll ring and a fit for "all hand sizes"; the listing comparison showed it at $44.99.

How we judged it

A buy-once trackball has to stay comfortable, work with your next computer and carry a warranty that catches early failures. Our sources: the Amazon US listing as checked by hand on October 26, 2026; Kensington's Expert Mouse Wireless product page (checked October 26, 2026); Kensington's pages for the SlimBlade Pro and Orbit Wireless; and independent reviews from CGMagazine and Switch and Click.

Who the Expert Mouse Wireless is for

Average to larger hands: Kensington says the design is meant "to comfortably fit users with average to larger sized hands".
Left- or right-handed users: the shape is ambidextrous, with four buttons around the ball.
Long document and spreadsheet sessions: the scroll ring around the ball lets you move through long pages without a wheel. CGMagazine's reviewer found the ring smooth and reported less wrist fatigue over long workdays.
Mixed Windows and Mac desks: it connects over Bluetooth LE or a 2.4 GHz USB nano receiver, so a laptop can connect without using a USB port at all.

Who should skip it

You run Linux, or a Windows on ARM laptop and want custom buttons: the listing says Linux is not supported, and Kensington says its KensingtonWorks software does not support Windows ARM computers.
You use a Chromebook and want to remap buttons: Kensington says ChromeOS gets basic trackball functions but no KensingtonWorks customization.
You have small hands: Switch and Click notes that smaller hands may find the large ball gets in the way of the buttons and scroll ring. Look at the Orbit Wireless instead.
You want a rechargeable device: it runs on two AA batteries. The SlimBlade Pro is Kensington's rechargeable option.
You game: CGMagazine's reviewer did not recommend it for gaming; this is a work tool.

What the Amazon listing says (checked October 26, 2026)

The Wireless style showed $90.35 and in stock, with 4.2 out of 5 from 5,431 ratings, for New York ZIP 10045; the wired style showed $62.99. The listing names Windows, macOS 10.14 or later and ChromeOS, says Linux is not supported, includes two AA batteries, and states 3-year coverage plus lifetime technical support. We did not confirm the seller.

Expert Mouse Wireless specs at a glance

The specs below come from Kensington's product page and the Amazon listing; the 55 mm ball is the main reason to pick it over the Orbit.

Spec	Expert Mouse Wireless (this guide)	Orbit Wireless (for comparison)
Price	$90.35 on Amazon US, checked October 26, 2026	$44.99 in the Amazon listing comparison, October 26, 2026
Ball	55 mm, finger-operated	40 mm, finger-operated
Scrolling	Scroll ring	Scroll ring
Tracking	Optical (DiamondEye), 400 DPI per Kensington	Optical, 400/800/1,200/1,600 DPI per Kensington
Buttons	4, programmable in KensingtonWorks	Programmable in KensingtonWorks
Connection	Bluetooth 4.0 LE or 2.4 GHz nano receiver	Bluetooth LE or 2.4 GHz
Power	2 × AA (included), auto-sleep	AAA batteries
Size	3.5 × 6.1 × 8 in (listing)	Smaller; Kensington says it fits all hand sizes
Wrist rest	Detachable	Detachable
Warranty	Limited 3-year (Kensington)	Limited 3-year (Kensington)

Illustration of a square black trackball with its large red ball lifted out, a detachable wrist rest, a tiny USB receiver and two AA batteries laid out on a desk — Illustration (not a product photo): what you get, per the listing and Kensington: the trackball with a removable 55 mm ball, a detachable wrist rest, a 2.4 GHz nano receiver and two AA batteries. 3.5 × 6.1 × 8 in. Wireless $90.35, wired $62.99 on Amazon US, October 26, 2026.

How long will it last, and what wears out?

Apart from batteries, its lifespan comes down to the scroll ring, buttons and wireless link, all inside Kensington's limited 3-year warranty.

The ball is not locked in place; Switch and Click points out that it simply lifts out, which makes cleaning easy but means it can fall out if the trackball is flipped. The same reviewer says the scroll ring relies on a magnet and an infrared sensor, so dust and debris can affect how smoothly it responds. Lifting the ball out and wiping the cavity now and then is the routine care.

On power, CGMagazine reported that the two AA batteries had not died after weeks of use. One buy-once point to note: Kensington's own US web store showed this model as unavailable when we checked on October 26, 2026, so Amazon is the practical place to buy it today. Keep your receipt for the warranty.

Pros and cons from the listing, maker and reviews

At 4.2 out of 5 from 5,431 ratings, the Expert Mouse Wireless is well liked, with real trade-offs that show up in reviews.

Pros

Large 55 mm ball moved by your fingers, plus a scroll ring, per Kensington.
Two wireless options: Bluetooth LE or a 2.4 GHz USB nano receiver.
Limited 3-year warranty from Kensington; the listing adds lifetime technical support.

Cons

Scroll ring can be inconsistent: Switch and Click says the ring can be inconsistently smooth and may become unresponsive, because its sensor is sensitive to dust.
Wireless and software quirks: Switch and Click says the 2.4 GHz link works best with line of sight to the receiver, can suffer interference near USB 3.0 ports, and that the software "may be buggy at times".
It is big, and steep without the rest: CGMagazine found the angle tiring without the wrist rest and called the rest "more of a requirement"; Switch and Click says the angle may strain your wrist.
Learning curve: CGMagazine found click-and-drag and small links tricky at first.
AA batteries, limited OS support: no built-in rechargeable battery, no Linux, and no button customization on ChromeOS or Windows ARM.

Illustration of a large hand comfortably covering a big square trackball while a smaller hand stretches to reach its buttons, with a compact round trackball nearby — Illustration (not a product photo): hand-size fit: Kensington designs the Expert Mouse Wireless for average to larger hands; smaller hands may prefer the 40 mm Orbit Wireless ($44.99 in the listing comparison) or a mouse. Expert Mouse Wireless $90.35 on Amazon US, October 26, 2026.

The buy-once math

At $90.35 over the 3-year warranty period, the trackball costs about 8 cents a day; spread over five years it is about 5 cents a day before batteries.

That assumes daily use; add a few dollars a year for AA batteries. Try your own numbers in our cost-per-use calculator.

Build the rest of the desk

A trackball fixes how your hand moves; the rest of the desk sets your posture. Our Ergotron LX monitor arm guide covers getting the screen to eye height, and the CalDigit TS4 dock guide covers one-cable laptop setups. Browse every desk guide on our home office hub.

FAQ

Does the Kensington Expert Mouse Wireless work with Mac?

Yes. The listing names macOS 10.14 or later, and it connects over Bluetooth LE or the included 2.4 GHz receiver. Button customization uses Kensington's KensingtonWorks software.

Does it work on Linux or Chromebook?

The listing says Linux is not supported. On ChromeOS, Kensington says you get basic trackball functions but cannot customize buttons in KensingtonWorks.

What is the warranty?

Kensington lists a limited 3-year warranty, and the Amazon listing mentions 3-year coverage plus lifetime technical support.

Bottom line

At $90.35 (checked October 26, 2026), the Kensington Expert Mouse Wireless is a sensible buy-once trackball for Windows and Mac users with average to large hands who want a big ball, a scroll ring and a 3-year warranty. Skip it for Linux, small hands or a rechargeable setup. Prices change, so re-check the price and stock in the buy box before you order.

See the Expert Mouse Wireless listing on Amazon (US)

Primary sources: Kensington's Expert Mouse Wireless, SlimBlade Pro and Orbit Wireless pages, CGMagazine and Switch and Click (checked 2026-10-26).