Bang & Olufsen Bang & Olufsen's portable Bluetooth speaker allows you to listen to all your favorite music nearly anywhere, including the beach or unequipped hotel rooms. It's made from sleek rose gold aluminum and has a double-molded polymer base for protection. It has a built-in microphone for hands-free calling and a single-charge battery life of up to 24 hours. - Compatible with MP3, cell phones and other audio devices - Designer color: Sandstone