1. Make sure the Android TV dongle is installed
2. Power on the projector
   
3. Press the “Setting” button on the remote control or the screen > Remotes & Accessories > Add accessory > Activate Bluetooth-pairing mode and select your Bluetooth devices* on the screen > select “Pair”

*NOTE: Only one Bluetooth device can be connected at once. If you want to connect to external Bluetooth speakers or headphone, there will be minor audio lag, around 300ms, it's okay for listening to music but may experience minor latency while watching movies.

More tips for you on using Bluetooth mode: After that, you can press the “Bluetooth” hotkey on the top of the projector, the projector will switch over to “Bluetooth speaker mode”, which is designed simply for music enjoyment.