Lakeman Portable Wireless Bluetooth Speaker Waterproof for Outdoors Powerful Sound with HiFi Subwoofer Dual Speakers Built-in Microphone for Call 7000mah Power Bank for Smart Phones - Black No more worrying about rain or spills. Just don't submerge it. Allows you to wirelessly stream music through any Bluetooth enabled device. With its built-in 7000mAh battery, it can charge your cellphones as a powerbank. The built-in microphone allows you to answer calls without skipping a beat. Features two 10-watt high frequency speakers ensuring HiFi stereo sound quality.