BRAVEN BRV-PRO Portable Wireless Bluetooth Speaker [30 Hours][Waterproof] Built-in 2200 mAh Power Bank Charger - Black/Red Impressive 15 hours of wireless playtime. Charge your mobile device using the speaker's built-in 2200mAh Lithium-ion battery. Built-in noise-canceling microphone can be used to take and make calls hands-free. Customize your BRV-PRO with the BRV ecosystem: Threaded mounts, swappable housing covers, modular features and more