The Eco Terra Boom Box is a floating IPX7 waterproof iPhone or MP3 player/storage case that is fully submersible in water. The Eco Terra is built with two large waterproof stereo speakers and is powered by 4 C-Cell batteries or AC power adapter (included). The two full-range, 3-inch forward firing speakers provide a crisp clean sound and can be played in virtually any position (open, closed, upright, onside, or upside down). The internal waterproof storage compartment holds and protects your keys, MP3 player, credit cards, driver's license and cash, keeping it safe from sand, sun and water. The heavy duty industrial design includes a platform to vertically stand your case while open or closed. The Eco Terra also has a uniquely designed exterior pressure release valve that ensures your case is closed air tight and is easily opened at low and high altitudes. When thrown into the water, the Eco Terra case will always rotate in to position to float with the speakers pointed up so you can always enjoy your tunes! Features: 25+ hours battery life Detachable carabineer clips for hands free usage Convenient hanging options Internal waterproof storage compartment for keys, MP3 Player, credit cards Nylon belt for use with carabiner clips Audio AUX-in Adjustable carrying handle A/C power adapter Shoulder strap 2 carabiner clips Materials: Polycarbonate/rubber over mold Dimensions: 14.6"L x 5" W x 7.6" H Weight: 4.1 lbs. iPhone is a trademark of Apple Inc, registered in the U.S. and other countries.