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by egypturnash 2152 days ago
My QC35s don't have that button. It's only available in the app, and there is no fine-grained control or anything - just high/low/off.
1 comments

I have QC35s too. Maybe a newer rev?
Apparently so. I have the QC35 II, which has a button on the left ear can. Bose calls it the Action Button, and it's used to summon Alexa/Google Assistant; but if you don't configure it to use an assistant (through the Connect app?) it will cycle through the noise cancellation level settings.