As part of the Klipsch Heritage Wireless series, the Heritage Groove incorporates luxury materials, including real wood veneer and tactile spun switches and knobs, with the latest acoustic technologies. 20 watts total system power frequency response: 65-22,000 Hz stereo 3.5mm mini jack input for portable devices USB charging cable built-in rechargeable battery delivers up to 8 hours of operation Equipped with one microphone for hands-free calling, Bluetooth® wireless technology and an 8-hour battery life, the Heritage Groove is the perfect, easy to use portable speaker