Your speaker could interfere with other passengers�?devices. If your speaker is too loud, it could interfere with other travellers�?devices, including their headphones or tablets. This might make it difficult for them to watch movies or listen to music. On one other speaker, press and hold the Bluetooth button as https://www.bluetoothspeaker.top/bluetooth-speaker-with-rgb-flashing-light-stereo-surround-sound-audio-subwoofer-loudspeaker/