IP67 is a standard ranking right now indicating extremely resistant and possibly rugged audio system appropriate for out of doorways audio system. Lastly, determine which sort of connection method is suitable for your setup. There are actually different approaches to connect a microphone to some Bluetooth speaker, for instance https://www.bluetoothspeaker.top/haut-parleur-hifi-subwoofer-parlante-portatil-sound-box-bluetooth-speaker-with-flashlight/