Sony WH-CH710N Help Manual page 4

Charging time is too long.
The headset cannot be charged even if connecting the headset to a computer.
The remaining battery charge of the headset is not displayed on the screen of smartphone.
Sound
No sound
Low sound level
Low sound quality
Sound skips frequently.
The effect of noise canceling is not sufficient.
Bluetooth connection
Pairing cannot be done.
One-touch connection (NFC) does not work.
Unable to make a Bluetooth connection.
Distorted sound
The headset does not operate properly.
Cannot hear a person on a call.
Low voice from callers
Resetting or initializing the headset
Resetting the headset
Initializing the headset to restore factory settings
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