Four Pedals, One Gemini CLI Review Loop

Pedal Four is a four-pedal USB foot switch with its driver built into the device, so it works the moment you plug it in. No software to install on the host, on any platform. For a Gemini CLI session, that gives you four hands-free actions instead of the usual two: accept, reject, and two more slots for whatever you repeat often enough to be worth a pedal, such as running tests or moving to the next diff.

What plug-and-play actually means here

Because the driver lives on the pedal itself rather than in a separately installed utility, connecting it is the entire setup step. It enumerates and works immediately, on macOS, Windows, or Linux alike. Reprogramming what each pedal sends still uses the on-device configuration, but you're not hunting for a platform-specific installer first.

What the fourth pedal buys you over the three-pedal unit

The core review loop, brief the agent, wait, review, accept or reject, only strictly needs two pedals. The third and fourth earn their keep on the actions around that loop: push-to-talk for dictating the next brief, or a dedicated key for whatever step you run between accepting one change and starting the next. If your Gemini CLI sessions involve a repeated third or fourth action, that's the case this pedal is built for; if accept and reject cover it, the three-pedal version does the same job for less.

What the pedals can be set to send

Beyond code review, the same four-pedal layout shows up in medical and industrial dictation work, which says something about how generally useful four hands-free actions turns out to be, not just for coding agents.

It's also built for streamers, and that matters for the price

Four is also the number streamers want for OBS: scene switching, mute, and record, hands free, while their hands stay on keyboard or controller. That dual audience is part of why this exists as a four-pedal unit rather than just a bigger version of the three-pedal one.

Why foot pedals cost more than they look like they should

Be aware going in: foot pedals carry a much higher United States duty rate under the applicable tariff classification than a macropad is charged. That's the honest reason a fairly simple mechanical device costs what it does, not a markup we're hiding. If a fourth hands-free slot isn't something you'll actually use, that duty rate makes the three-pedal unit, or a macropad with a spare key, the more sensible buy.

Who should skip straight to a macropad

If your desk space or budget favors a device that isn't attracting pedal-specific duty, a macropad like the KM16 covers the same accept-and-reject keys plus far more headroom, at hand rather than foot level.

Full specs live on the Pedal Four product page, and you can browse every Gemini CLI hardware guide from the tag hub.