Ruggedness and waterproof design: We give precedence to speakers that are built to survive the knocks and bumps of travel. We prefer speakers with an Ingress Security (IP) score, which informs you precisely how dustproof and waterproof a speaker is. This small, round speaker provides a normal sound and https://www.bluetoothspeaker.top/stereo-surround-sound-audio-subwoofer-bt-wireless-outdoor-bluetooth-speaker/