Technically no Digital is entirely waterproof, with sufficient time and depth any speaker will fall short, but some Bluetooth speakers are built a lot more durable than others. Toughness is normally indicated by an official Ingress Protection (IP) rating. It’s just like the size of a small clutch bag, https://www.bluetoothspeaker.top/outdoor-connection-high-quality-sound-wireless-speaker-for-bluetooth/