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They turn on everytime you turn on your headphones. You just have to press the power button twice to turn ANC off for the headphones to be in low power mode.
Sorry, there was a problem. Please try again later.The default for the headphones is for the Pure ANC to be on. To toggle between on and off you simply press the button on the left hand side.
I would recommend:
Sorry, there was a problem. Please try again later.I can answer one part of this and tell you that the noise cancelling does come on when you turn them on. As far as turning it off - it will extend battery power by a lot. So it is a good idea if you're in a quiet environment already - if you want to know how to turn it off, just have a long look in the short owner's manual, lol :)
Sorry, there was a problem. Please try again later.You cannot turn off the noise cancelling function. Bose headphones do allow for this though
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