The TREBLAB HD-Max is a large loud Bluetooth speaker with bass and features a four-speaker design. The 50W speakers and 3 sound modes can function indoors and outdoors. This wireless speaker is built tough and can stand up to anything, thanks to its superior build materials. It comes with a power bank with pass-through charging and a USB-C connector. Use the 20H playtime and quick charge-time to always stay connected. Pair it with one additional speaker to give you a strong connection and surround sound quality. Its IPX6 waterproof rating enables it to withstand anything from the beach to the pool. you can even put it in the bathroom while you are in the shower.