If the CUSTOM button is set as the Amazon Alexa button, the noise canceling function and Ambient Sound Mode cannot be
switched from the headset. In this case, you can change the settings of the noise canceling function and Ambient Sound Mode
with the "Sony | Headphones Connect" app.
Related Topic
About the voice guidance
Turning on the headset
What is noise canceling?
Listening to ambient sound during music playback (Ambient Sound Mode)
What you can do with the "Sony | Headphones Connect" app
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