Integrated Solar panel creates 325mAh per hour = more power than speakers use at normal listening levels. Never have to plug into a power outlet ever again. Yes, it’s waterproof! Designed for whatever life throws at it, the SOL JAM meets and exceeds the IPX7 waterproof standard. No need to worry if you accidentally spill coffee on your Sol JAM or drop it in the pool because it’s not only waterproof, it floats too!