The Wonderboom four provides a pure equilibrium of bass to midrange to treble, which indicates no instruments or voices are unnaturally boosted. Ruggedness and waterproof design: We give precedence to speakers that are built to survive the knocks and bumps of travel. We choose speakers with an Ingress Security https://www.bluetoothspeaker.top/multifunctional-charging-wireless-bluetooth-speaker-rgb-portable-5-0-speaker/