Part 1: Pair the headphone with a sound source device:
Step 1: Make sure that the headphones are powered on, slide the power switch to the middle position as shown in the following:
Step2: Slide the power switch to the Bluetooth icon side and HOLD it there for 2 seconds until the LED indicator alternates between flashing RED&BLUE, you will also hear the voice prompt saying "Pairing" if you have it on.
Step3: In the Bluetooth settings menu on your device, locate "Avantree XXX(model name)", click "Pair" to connect the headphones. Once connected, you'll hear "connected" in the headphones.
Part 2: Reconnect to the Last Paired Device:
The headphone usually reconnects to the last paired device once powered on, to manually reconnect, you just need to push the power switch to the Bluetooth icon side once, and do not need to hold it there, it will reconnect to the last paired device.
Part 3: Pair the Headphone to Another Device:
Please set the headphone into pairing mode again and pair with another device, you can simply refer to the procedures in Part 1 above.