We tested Bluetooth speakers with expert listeners, and we concealed the identities on the speakers to do away with bias. It's got a tweeter along with a woofer driver with stereo channels. It has an IP67 waterproof rating with a dual passive bass radiator. You could check for more https://www.bluetoothspeaker.top/portable-outdoor-waterproof-ip67-wireless-fabric-bluetooth-speaker-with-effect-lighting/