Your speaker could interfere with other travellers�?devices. If your speaker is too loud, it could interfere with other travellers�?devices, such as their headphones or tablets. This may make it difficult for them to watch movies or listen to music. 4. Label your bag with your name and phone information. https://www.bluetoothspeaker.top/bass-subwoofer-loudspeaker-stereo-rgb-light-transparent-bluetooth-speaker/