A multi-zone audio system is provided that is portable to a handheld audio device at a plurality of locations. The system includes a multi-zone audio system controller having an audio input/output selection circuit for selectively regulating the source and distribution of audio signals. A plurality of...http://www.google.com.hk/patents/US7929961?utm_source=gb-gplus-share專利 US7929961 - Wall mounted docking station
