Sony WH-XB900N Help Manual page 89

To decrease the volume: Swipe down repeatedly until the volume reaches the desired level.
To change the volume continuously: Swipe up or down and hold. Release at the desired level.
When the volume reaches the maximum or minimum, an alarm sounds.
To end the call, double-tap the touch sensor control panel.
4
If you made a call during music playback, music playback resumes automatically after ending the call.
Hint
Volume for a call can be adjusted during a telephone conversation only.
The headset volume during a call and during music playback can be independently adjusted. Changing the call volume does not
change the volume of music playback and vice versa.
Note
Use a smartphone or mobile phone at least 50 cm (19.69 in.) away from the headset. Noise may result if the smartphone or
mobile phone is too close to the headset.
Related Topic
How to make a wireless connection to Bluetooth devices
Receiving a call
Functions for a phone call
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