The Rock Out2 Solar Speaker boasts a weatherproof outer shell and is built on durable POM plastic for extreme stability. With a durable, weatherproof exterior thatäó»s built to withstand the toughest elements Mother Nature can throw, the Rock Out 2 Solar Speaker proves its worth as an outdoor speaker, and serious protection for your gear. Its roomy inner fabric-lined compartment and heavy-duty zipper keeps phones and iPods inside while preventing water, dirt and grime from getting in. The Rock Out 2 Solar Speaker features an innovative DarkBass chamber that allows massive airflow for deep, precise sound without excess space. Its two 40 mm, 4W drivers deliver a full-range of precise sound for an unparalleled stereo experience, even when youäó»re far from home. When every ounce counts and size matters, the Rock Out 2 Solar Speaker ensures youäó»ll never have to sacrifice on quality sound. Some adventures require more sound than the competition can pump out. Unique to the Rock Out 2 Solar Speaker is its ability chain with other speakers, taking your music to a whole new level. With one-touch Bluetooth pairing, stereo streaming and a built-in waterproof microphone, you can easily connect your smartphone and seamlessly answer calls without interruptions. The Rock Out2 Solar Speaker is the perfect hands-free solution when youäó»re on any adventure. No cables. No hassle.