A remote control system, which is adapted for wirelessly communicating an earphone with an audio/video system having an audio signal output, includes an audio signal transmitter adapted for operatively connecting to the audio signal output of the audio/video system so as to transmit an audio signal therefrom,...http://www.google.fr/patents/US20040247138?utm_source=gb-gplus-shareBrevet US20040247138 - Audio/video remote control with built-in earphone system
Audio/video remote control with built-in earphone system
