JBL Pro Sound with an optimized long excursion driver, separate tweeter and dual JBL bass radiators Long lasting battery delivers up to 20 hours of playtime Take the Charge with you anywhere due to its IP67 waterproof and dustproof rating Party Boost feature allows you to pair two JBL Party Boost-compatible speakers together in stereo or link multiple JBL Party Boost-compatible speakers for really incredible sound Built-in power bank lets you charge your devices without taking a break