Soundcore Party-Cast is a portable speaker with 80 Watts of power, an 18-hour playtime, and Light Show. Featuring Party-Cast technology that allows you to sync both Lights and Music with over 100+ Party-Cast speakers to create the ultimate experience. IPX7 waterproof means you don't need to worry about water and with its USB charge out capabilities your phone will stay charged no matter how long the party lasts. Fully waterproof with IPX7 Rated Protection. Big Bass. Party Cast Technology. Beat driven light show.