Initializing the headset to restore factory settings
Disconnect the micro-USB cable, turn off the headset, then press and hold the 
button and the NC/AMBIENT button simultaneously for more than 7 seconds.
The indicator (blue) flashes 4 times (
), and the settings such as the volume adjustment are reset to the factory settings. All pairing information is deleted. In this case, delete the pairing information for the headset on the device which has been connected, then pair the headset with the device again.
If the headset does not operate correctly even after initializing, consult your nearest Sony dealer.
