First Look: The Expert Mouse Pro TB900 EQ is Kensington’s most advanced trackball yet, built for speed, comfort, and serious productivity

If you spend your entire day managing complex multi-monitor setups, editing video, or plowing through spreadsheets, you know that standard mice aren't always the best fit for long-term comfort. While ergonomic vertical mice get plenty of spotlight, trackballs have retained a dedicated, almost legendary following for a reason: pure, effortless efficiency.

And when it comes to trackballs, Kensington is royalty. Celebrating 40 years of innovation in the space, the company is preparing to launch its most ambitious peripheral yet: the Kensington Expert Mouse Pro TB900 EQ Trackball.

I’ve been spending some quality hands-on time with an early review sample—specifically the eye-catching red ball variant (it also comes in silver)—to see if it lives up to four decades of heritage.

Here are my early impressions of what might be the ultimate desk upgrade for power users.

Kensington had no input, nor did it see the contents of this hands-on preview prior to publication.

Design: Classic presence, modern polish

(Image credit: Daniel Rubino)

The TB900 EQ keeps the commanding footprint and symmetrical silhouette that made the original Expert Mouse series famous. The ambidextrous chassis ensures lefties and righties get the exact same ergonomic comfort.

At the center sits that signature, massive 55mm ball. The red sphere on my unit gives the trackball a vibrant, premium look against the dark chassis. One notable departure from legacy models: there is no wrist rest included in the box. While classic Expert users might miss the snap-on rubber pad, the naturally sloped angle of the body still feels surprisingly natural during extended typing-and-navigating sessions.

Also, buttons. LOTS of buttons and dials everywhere.

Controls: Macro heaven with software smarts

(Image credit: Daniel Rubino)

Kensington didn't just update the chassis; they overhauled how you interface with your PC. The hardware features a wealth of physical input options, including:

The classic Expert scroll…