Step 1: The two buttons of this Bluetooth headset, one is the function key, which is responsible for turning on and off the phone, adjusting the "pairing" mode, answering the phone and hanging up the phone, and the other is the volume rocker, which is used to adjust the volume.
Step 2: The indicator light and microphone are on the other side.
Step 3: Press and hold the function key for 3 seconds in the off state until the green light flashes, and immediately release the function key to enter the on state.
Step 4: If you want to turn off the power in the "On" state, press and hold the function key for 3 seconds until the red light flashes, and then you can turn off the power.