Superior Sound: Dual high-performance full range drivers delivered 20W crystal clear loud sound and double passive radiator produce balanced bass, room filling sound. Life-Proof: IPX7 Waterproof protection Bluetooth speaker against rain, dust, snow, and shock. Perfect for home, yard, beach, shower or pool party. Durable design great for travel, camping, boating, Kayaking, outdoor adventure. Long Playtime: Built-in high-performance Li-ion battery up to 20 hours playtime at 50% volume(Playtime varies according to volume level and audio content), battery status will display on the speaker when press the power button.