Eton Rugged Rukus Xtreme The Super-Loud, All-Terrain, Smartphone Charging, Dual-Powered Wireless Sound System for Xtreme Audiophiles, NRKS400GR Solar or AC Powered - Renewable Energy, Power Away from Home Audiophile Quality Sound - Sound is Everything Charges your Smartphone - Keep Tunes Going Lasts 8+ Hours without Power - Listen Long into the Night Rugged and Water Resistant - Take it Anywhere Great by the Pool, Camping, the Park, at the Beach or just at Home.