1, non-compulsory method: at the same time, press and hold the "power switch" and "volume +" button 15 seconds do not let go, and wait until there is a response can be.
2, mandatory method: first turn on the headset (do not need to enter the pairing state), this time to the Bluetooth headset charging about 5-10 seconds of electricity, so that most of the Bluetooth headset charging in the boot state will be forced to shut down, enter the state of the factory settings. This method who says it's mandatory, but there are times when it doesn't work for some Bluetooth headsets.
If there is only one button without volume keys, you can only use the mandatory method.
Users in the use of Bluetooth headset will inevitably encounter some trouble, even if the formal operation method for pairing, but always appear Bluetooth device can not be searched for; or search for a Bluetooth device but enter the correct pairing password but prompted the password error. The main reason is that the built-in chip program of the Bluetooth headset has not been activated, or the memory function of the Bluetooth headset is terminated because of too many connections. You will need to restore the factory settings.