Your speaker could interfere with other travellers�?devices. If your speaker is simply 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. four. Label your bag with your name and call data. https://www.bluetoothspeaker.top/bluetooth-speaker-wireless-loudspeaker-led-subwoofer-portable-mp3-music-sound-party-speaker/