Wireless Bluetooth Streaming Wirelessly connect up to 2 smartphones or tablets to the speaker and take turns playing impressive stereo sound. Up to 24 Hours of Playtime Builtin rechargeable Liion battery supports up to 24 hours of playtime and charges devices via dual USB ports. IPX7 waterproof Take Boombox to the beach or pool without worrying about rain, spills or submersion in water.