1. Take out the headset from the charging chamber, and the headset will start automatically when the blue light is on for 1 second. The headset is outside the charging chamber and is in the off state. Press and hold the MFB key for 3 seconds, and the blue light will be on for 1 second. The headset will start automatically. 1. When the phone is turned on, put the headset into the charging box, and the headset will automatically shut down and broadcast a prompt tone to enter the charging mode. 2. Press and hold the MFB key for 3 seconds, and the headset will automatically shut down.