BRAVEN 770 Portable Wireless Bluetooth Speaker [12 Hr Playtime][Water Resistant] Built-in 1400 mAh Power Bank Charger - Black Portable Bluetooth and weatherproof (IPX5) speaker with 12 hour playtime. Aircraft grade aluminum housing with built-in mic and noise-cancelling speakerphone. 1400mAh portable power bank for power on the go (1A USB output). True Wireless left and right stereo pairing with 2nd Braven 7-series speaker.