Sony WH-CH720N Help Manual page 123

Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH720N
The headset cannot be operated.
Reset the headset. This operation does not delete pairing information.
If the headset does not operate properly even if you reset the headset, initialize the headset.
While the headset is connected to a device via the supplied headphone cable and the headset is turned on, you
cannot perform operations such as volume adjustment or play/pause.
Related Topic
Resetting the headset
Initializing the headset to restore factory settings
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