An audio-video output apparatus of the present invention outputs at least one of audio data and video data to a receiving apparatus using High-Definition Multimedia Interface communications. A flexible circuit having conducting tracks on at least one of its sides is used. Underlying the table UI, the architecture separates data handling functions from presentation functions. The AGC circuit also possesses the ability to process a change in the frequency of a pilot carrier signal remotely. In addition to being light and portable, the hollow structure permits water to enter and drain through perforations and accordingly resist buoyancy when the table is immersed in water.