1. If you do not charge it, please wipe the sweat / water / foreign objects on the earphone charging port.
2. If the power is not on, please try the following method.
1. Hold down the power button, place the headset in the USB socket, then insert DC5V to activate.
2. If the headset is not used for a long time, the power of the headset will drain over time.It is recommended to fully charge it before turning on the power.
3.When you make a call, the noise may be caused by the following:
1. The volume of the headset is too small.
2. There may be interference with the radio waves of the opponent.
4. If you cant get the sound connected, please try the following method.
1. After disconnecting the headset and smartphone pairing, try again.After entering the Bluetooth settings on your phone, select your current Bluetooth headset item, click ignore this device to reenter the search mode of Bluetooth headset and pair it.
2. Before connecting to your phone, please output the force and press the button 2-3 times.Then adjust the volume from the smartphone side when listening to music.