Ruggedness and waterproof design: We give precedence to speakers that are built to survive the knocks and bumps of travel. We desire speakers with an Ingress Protection (IP) ranking, which lets you know accurately how dustproof and waterproof a speaker is. Most airlines assist you to bring a speaker https://www.bluetoothspeaker.top/active-type-high-end-speaker-bluetooth-promotion-soundcore-bluetooth-speaker/