Sony WH-CH720N Help Manual page 112

Help Guide
Wireless Noise Canceling Stereo Headset
WH-CH720N
Unable to turn on the headset.
Make sure the battery is fully charged.
The headset cannot be turned on while charging the battery. Remove the USB Type-C cable and turn on the
headset.
Reset the headset.
Initialize the headset, and pair the headset and the device again.
Related Topic
Charging the headset
Checking the remaining battery charge
Turning on the headset
Resetting the headset
Initializing the headset to restore factory settings
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