Rockbox Brick is a speaker perfect for a little get-away. Designed to let you bring the party to every room and with the built-in passive radiators you have a clear deep bass. Built-in powerbank - Ch power for your phone? Charge your phone or other devices via USB with the built-in Powerbank. This Brick is a perfect party accessory because it will give you twenty hours of non-stop music. The Bric The Rockbox Brick has a built-in microphone, so you can take that birthday call from your soon to be lover.