Ready to provide your next outdoor adventure with massive JBL pro sound, the Xtreme 4 portable wireless waterproof speaker from JBL in black, features dual 2.8" woofers, dual 0.7" tweeters, and dual passive radiators. Your music will sound balanced and have benefit of rich, deep bass response; even at high volumes thanks to AI sound boost. Experience the great outdoors without worry as you stream your favorite music via Bluetooth. The Xtreme 4 is waterproof, dustproof, and has rugged rubber bumpers to handle bumps and impacts. The huge, replaceable battery can play your music for up to 24 hours, with an extra 6 hours available via a tap of playtime boost.