The JBL Boombox 4 is JBL's largest portable Bluetooth speaker. Thanks to the 2 large passive subwoofers on the side, the Boombox produces a low and powerful bass. This way, you can even hear the music clearly in a large space. Thanks to the 24-hour battery life, you can listen to music for days. Feel free to place the speaker outside thanks to the waterproof design, like next to the pool or at the beach. For really powerful sound, connect several Boomboxes together.