This waterproof speaker is compact, lightweight and skin-friendly ABS and silicone foam factor ensure runs in varies extreme conditions and environment, outdoor and shower, bring it to the beach, pool, boat, your car and anywhere you want great sound. Compatible with smart devices such as iPhone, iPad, Samsung phones or your laptops. Simply pair it on your smart phones, then it is connected. 3 3/4"L x 3 1/4"W