If it’s a 7, it could be submersed in shallow water; a 6 implies it’s good inside the rain, and less than that usually means a splash received’t get rid of it, but you’ll wish to keep it from getting damp. I also measure the maximum Bluetooth range of https://www.bluetoothspeaker.top/new-led-speaker-hifi-subwoofer-waterproof-wireless-bluetooth-speakers/