Firmware Update-May 2026

Your knife just got even better. Firmware 2.2.0 is available now and includes meaningful improvements to auto-tune and longer standby battery life. Here's what changed and why it matters. 

Smarter auto-tune

Your knife works by creating resonance — vibrating at just the right frequency to buildup a standing wave of constructive interference. That frequency shifts constantly in response to temperature, the food you're cutting, and even how tightly you're gripping the handle. The C-200 has always run a feedback loop to track this moving target in real time. But in the original firmware, if resonance drifted too far off center, auto-tune could get confused and lock onto the wrong frequency — and you'd have to manually sweep and reset using the Tune-up Console or the Manual Retuning gesture. In the new firmware, auto-tune will recognize when it's lost track of resonance. Rather than getting stuck, it performs a smart, sparse scan of the full frequency band in just a few seconds and finds its way back. Your knife stays at its strongest, automatically.

 

Longer standby life

When the knife is off, it still draws a small quiescent current from the battery, just like most portable electronic devices. In the original firmware, that idle draw was around 3milliamps, which drained a full battery in roughly two weeks. However, we’ve found some optimizations in code to cut that idle draw by more than half. Standby time is now closer to a month. If you will be away from your knife for along time, removing the battery from the handle will stop the current draw entirely.

How to update

Go to tuneup.seattleultrasonics.com and follow the instructions to connect your knife over Bluetooth. There’s no sign-in, no Wi-Fi pairing, and if you’re on Windows, Mac, or Android, there’s no app to download. (iPhone and iPad require a 3rd party download because Apple blocks in-browser Bluetooth). The whole process takes about two minutes and ensures you’re getting the best possible performance from your knife.

Happy Cooking,

Scott and the Seattle Ultrasonics team