A communication system which ensures that the remarks can be heard wherever desired regardless of what the promotional or training venue is. The signal of the wireless microphone used by the master of ceremonies can easily be head in earphones within distance of 100 meters. It is used widely in factories, museum tours, open air meetings, industry and on-the-job training or by different groups. It is also possible to use the collapsible headphones as a simultaneous system or with several separate groups. A set consists of 20 receivers and 1 microphone. The number of earphones can be increased according to need.