Kensington Expert Mouse

By Xah Lee. Date: . Last updated: .


Kensington Expert Mouse trackball wireless 53042
Kensington Expert Mouse trackball, wireless version. Buy at amazon
Kensington Expert Mouse trackball wireless bottom
Bottom. USB transmitter pocket. Buy at amazon

Work in Linux?

Yes. Works in Linux out of the box.

  1. Lower left button is left click.
  2. Lower right button is right click.
  3. Top left button is middle click.
  4. Top right button is browser back button.
  5. Scroll ring works.

You can remap mouse buttons in Linux using xinput. [see Linux: How to Swap Mouse Buttons]

Kensington Expert Mouse wireless 2017 03 26
Buy at amazon 〔image source imgur

Size Comparison

Trackball Sizes Comparison

Ball Size

Ball diameter is 55 mm.

Trackball Ball Sizes and Replacement


Kensington Expert Mouse trackball with pad
“Kensington Expert Mouse Optical USB Trackball” Buy at amazon
Kensington Expert Mouse scroll ring 67755
scroll ring.
video review. Buy at amazon

Expert Mouse vs Slimblade

Looking at all web comments, some people prefer the Slimblade, but some Expert Mouse.


History of Kensington Expert Mouse

Kensington was famous, throughout the 1990s in the Macintosh community, for its large ball trackball. In almost all 1990s, the Kensington trackball is the coveted device for high-end Mac owners for all their graphics design needs.

Since the 2000s or perhaps late 1990s, their market got eaten by Logitech Trackballs, and i think their product's quality and innovation also gradually declined.

I think one major problem is that the ball has a lot friction. I remember i tried it in stores and think the friction is the worst of all trackballs i've put my hands on.

Also, Kensington's classic design always seems unwieldy for me. That you have to bend your wrist up to use it. If i actually use this, i'll have to put a folded-towel in front to rest wrist on.

This trackball is notorious for not supporting Windows 7. ( update: Shadow Skill says Windows 7 driver has been released.)

Kensington Expert Mouse classic 70228
Kensington Expert Mouse, classic from ~1992. image source
Kensington Expert Mouse classic
Kensington Expert Mouse, classic from ~1992. image source ©
Kensington Turbo Mouse 87183
Kensington Turbo Mouse, came out in 1999. 〔image source reddit
Kensington 64213 Expert Mouse pro 89377
Kensington 64213 Expert Mouse pro. Came out in 2001. 〔image source imgur
Kensington Expert Mouse pink 43644
Kensington Trackball Pink Limited Edition

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