The Wonderboom 4 delivers a pure harmony of bass to midrange to treble, which indicates no devices or voices are unnaturally boosted. It's got a tweeter as well as a woofer driver with stereo channels. It's an IP67 waterproof ranking with a dual passive bass radiator. You could check https://www.bluetoothspeaker.top/wireless-bluetooth-speaker-home-pluggable-stereo-large-volume-high-sound-quality/