"Unleash powerful sound with the JBL by Harman Xtreme 4 Portable Waterproof Speaker! Crank it with confidence, knowing AI Sound Boost will analyze your music in real-time and maximize acoustic performance with less distortion. 2 powerful woofers and 2 tweeters deliver massive JBL Pro Sound with amazing dynamics, even at top volume, and dual JBL passive radiators pump deeper bass that'll get you movin'. Plus, you get a whopping battery life of up to 24 hours, and Playtime Boost will help you squeeze up to 6 hours of extra playtime out of the replaceable battery (included). A built-in power bank lets you charge your devices without taking a break from the music. This JBL portable speaker is made with recycled plastic and recycled fabric, and the IP67 waterproof and dustproof rating will keep it protected from the elements. Pair 2 Xtreme 4s (additional unit not included) for stereo vibes or link with other Auracast-enabled speakers (not included) for an even wilder dance party. Also features a convenient carry handle, rugged rubber bumpers, and a built-in bottle opener. Compatible with shoulder straps (not included) for crossbody carry. 11.69""L x 5.55""W x 5.87""H. Weight: 4.63 lbs. AI Sound Boost analyzes in real-time and maximizes acoustic performance with less distortion 2 powerful woofers and 2 tweeters for massive JBL Pro Sound Dual JBL passive radiators pump deep bass Battery life of up to 24 hours Playtime Boost helps you squeeze out 6 extra hours of playtime Built-in power bank charges your devices Made with recycled plastic and recycled fabric IP67 waterproof and dustproof rating Can pair 2 Xtreme 4s together Can be linked with other Auracast-enabled speakers Convenient carry handle Rugged rubber bumpers Built-in bottle opener Compatible with optional shoulder strap"