The DVD player is directly mounted without a cord in the video/audio input terminal (connector section), for example, which is provided on the rear side of the liquid crystal projector. The liquid crystal projector is so configured that video is projected on the basis of an input video signal and a radio transmission unit which transmits an input audio signal is directly mounted on without a cord. The radio reception unit is mounted on the speaker apparatus and the speaker outputs audio on the basis of a received audio signal.