BRAVEN 570 Portable Wireless Bluetooth Speaker [10 Hour Playtime][Waterproof] Built-In 1400 mAh Power Bank Charger - White Wirelessly stream your music over Bluetooth Take calls hands free through built-in microphone Charge mobile devices from a built in power bank Control tracks and volume right from the speaker Daisy chain additional speakers together for even more sound Take charge with built in power: Up to 10 hours of continuous play time with the 1200mAh battery. You can also plug your mobile device's charging cable into the speakers USB port and get an extra boost of power when you're away from home. ^Get Connected: Bluetooth 3.1, 33 ft. operating distance, 3.5mm line-in, 3.5mm out jack to connect to other Braven Speakers. ^Rich High Fidelity Audio: 2X custom extended range drivers. Left and Rich channel passive sub woofers. 6W Speaker output ( 3W per channel) ^Great Sound and Stunning Design: Impact resistant polymer housing. Room filling high fidelity audio drivers ^Accept and end calls right from the Speaker's controls.