Next level massive JBL Pro Sound: Two woofers, two powerful drivers and dual pumping JBL Bass Radiators effortlessly deliver dynamic, immersive sound with deeper bass and plenty of detail. You’ll get lost in the music wherever you are. 24 hours of playtime plus 6 hours with Playtime Boost: Take the JBL Xtreme 4 with you anywhere indoors and out. You can play your music all day long before you’ll need a recharge. Tap Playtime Boost to add up to 6 more hours to your battery life. Convenient shoulder strap: The speaker can be carried on the shoulder or can be adjusted as crossbody, whatever your style or the mood. AI Sound Boost: AI Sound Boost analyzes the incoming signal and uses an AI algorithm to predict the speaker movement and power response. The driver is pushed to its max capability creating a dynamic range and more powerful sound. Waterproof and dustproof: The JBL Xtreme 4’s IP67 waterproof and dustproof rating ensures this portable speaker can handle almost any environment, from a poolside party to a seaside picnic.