1. Maybe the headphone is out of power that it needs to be fully charged. If charged more than 30 minutes and there is still no light flashing. Maybe there is something wrong with the battery.
2. There is something wrong with chip data. You can try to restore the factory default settings.
3. Exclude the human factors (such as water damage, get wet and so on).

1. Misoperation. The headphone is on, but still does not enter the status of being searched. Please note that only when the red and blue lights flash can it be searched for.
2. If the red lights and blue lights alternately flash, (geek is that the blue light keeps on) but the phone can’t search for it yet, you can try as following: (1) Turn off the phone Bluetooth, reboot, and search again; (2) Restart the phone and search again. (3) Every chip of the products owns memory function. That is to say, every headphone can be repair with the device that paired with before automatically. However, the storage spaces of every chip can memory up to 6 to 8 devices. If headset pairs with devices exceed its limitation, it can be searched for anymore. Please restore the factory default settings of headphone, and connect again. If it fails, it may point to the problems of headphone signal ends, which we should offer exchange or refund.

If you can search the Bluetooth headphone in your phone but can’t connect it. Firstly, you should exclude that the headset had been paired with other cell phone before. (Please note that if the headset had been pair with other cell phone and this cell phone does not turn off its Bluetooth. Headset would pair with this cell phone automatically) You need to delete the phone connected records, restart it and reboot the headphone pairing mode so that it can be searched and paired.

1. Try to input “0000”.
2. Maybe there is something wrong with Bluetooth data in your phone. You need to delete the phone connected records, restart it and reboot the headphone pairing mode so that it can be searched and paired.

1. Phone or headphone is of low battery, please charge it fully.
2. The distance between the phone and headphone is too far (within 10 meters) or there is obstruction resulting in unstable signal, such as WIFI and so on. In this situation, please reboot the headphone, fully charge it and try it again anywhere without signal interference.
3. While walking, please put your phone and headphone in the pockets on the same side.
4. Clear all the devices paired before. Turn off the Bluetooth of the cellphone. Try to reboot and reconnect.
5. The signal of the cell phone varies according to the cell phone brands. Iphone is the best one, and then goes the Samsung in current marketing. The Bluetooth of other unknown cell phones is weaker. If Sound cuts in and cuts out, please try to pair it with other cell phones with better signals.

1. Low battery of headphone will lead to sound delay.
2. it’s related to the way Bluetooth works. Bluetooth sampling rate and error rate would be damaged during the time when the cell phone audio is processed to Bluetooth phone to be accepted and decoded.

1. No sound when making phone call or listening music.
2. No sound in the headphone or in the microphone.
3. Make sure both mobile audio and media audio are turned on first and reboot the cell phone if there is still no sound.4. Restore the factory default settings of the headphone.

1. Headphone data errors occur restore the factory default settings of the headphone.
2. Bluetooth data errors occur in the cell phone reboot the cell phone.
3. If the all methods fail, the circuit of the speaker maybe damaged by human factors or exogenic forces.

1. Figure out what kind of charger is used to charge. Please use other charging cables to charge.
2. The light is on or not when charging.
3. It could be the battery problem if the light still isn’t on after charging the headphone more than 30 minutes.