Unleash the powerful sound to shake the air. JBL Xtreme 3 Bluetooth speaker The JBL Xtreme 3 Portable Bluetooth Speaker features original JBL Pro sound. JBL Xtreme 3 is the ultimate portable Bluetooth speaker that delivers powerful, earth-shaking stereo sounds that shake everyone up with four working transducers and two JBL bass visible antenna transmitters, and with Party Boost, you can pair multiple speakers that support the JBL Xtreme JBL Party Boost brings room-filling sound and takes things to the next level. A little rain might ruin your fun, but the water and dust resistant Extreme 3 won't mind staying in the weather at all, and the convenient carrying strap with built-in bottle opener makes it easy to take the party indoors out of the rain.