Optimized for outdoors experience remarkable audio with the boombottletrade h2o the boombottle h20 waterproof speaker packs remarkable wireless audio into a rugged waterproof frame perfect for the poolside beach snow or any other environment where do you take your music remarkable sound 50mm up firing speaker and passive subwoofer produce impressive audio and improved acoustics the up firing speaker sends music in all directions bgtintegrated music controls easily control p