Burton Limited Edition Braven BRV-X Portable Bluetooth Speaker [12 Hours][Waterproof] 5400 mAh Power Bank - Camo Lime/Black Ultra-rugged, IPX 7 rated waterproof exterior makes the Braven BRV-X the perfect pair with your outdoor adventures Blast powerful, high definition sound with Outdoor/Indoor mode that will last you up to 12 hours Never lose your phones functionality with the built-in mic for speakerphone use and a battery bank to give you an extra boost of power Using the highly-acclaimed True Wireless technology, pair together two Braven BRV-X speakers for true left/right stereo experience