9 pre-recorded video discs featuring musical sing-along selections, [ video disc players, stereo amplifiers, ] video disc autochangers (multi-disc players), [ electronic unit for adjusting the key of music played on a video disc player to the voice of a person singing along with that music, microphones, wireless microphones, wireless microphone receivers, connection boxes for multiple microphones, video monitors, electronic unit for controlling video disc players actuated by insertion of currency, loudspeakers, and remote controls for video disc players ]
Trademark: 74303548
