Braven 570 Portable Wireless Bluetooth Speaker [10 Hour Playtime][Waterproof] Built-In 1400 mAh Power Bank Charger - Black 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 10 Hour Playtime with 1200 mAh battery Dual custom HD drivers with 6 Watt speaker output Integrated noise-cancelling microphone