Copenhagen is a loudspeaker produced by Vifa, with aluminum frame covered with fabric Kvadrat. Copenhagen is a loudspeaker from Nordic and elegant design, simple to use and portable, Copenhagen lets you create the right atmosphere at all times. Technology Copenhagen allows playback of high quality, pure sound without compromise is a feature of the philosophy of Vifa characteristic always appreciated by lovers of music and design. Technical features:Battery - Rechargeable Lithium; Connectivity - Bluetooth 4.0 aptX, Wi-Fi direct, Wi-Fi networked, Wired optical or analog 3.5 mm minijack, Wired USB;Frequency response - 50hz - 20khz @ +/- 3 dB;Tweeter - 2 X 28 mm Vifa driver unit with soft dome and neodymium magnet;Midrange - 2 X 50 mm Vifa driver unit with aluminium cone and neodymium magnet;Woofer - 2 X 80 mm Vifa driver unit with flat sandwich cone and neodymium magnet.