The Wonderboom four delivers a pure harmony of bass to midrange to treble, which suggests no devices or voices are unnaturally boosted. Ruggedness and waterproof design: We give priority to speakers that are built to survive the knocks and bumps of travel. We favor speakers with an Ingress Security https://www.bluetoothspeaker.top/bluetooth-speaker-outdoor-speaker-computer-audio-speaker-system-dust/