Ruggedness and waterproof design: We give priority to speakers that are built to survive the knocks and bumps of travel. We want speakers with an Ingress Security (IP) ranking, which lets you know exactly how dustproof and waterproof a speaker is. I’m a senior staff members author at Wirecutter, https://www.bluetoothspeaker.top/led-wireless-speakers-rgb-light-subwoofer-stereo-bluetooth-speaker/