There is provided a radio communication system including a first transceiver equipped with an antenna circuit and a transmitting-receiving unit and for transmitting a data signal by an electromagnetic wave, and a second transceiver equipped with an antenna circuit, a transmitting-receiving unit, a memory unit for storing the data signal, a display unit having display memory property, and a power source unit for obtaining an operation voltage for each unit from the electromagnetic wave. The first transceiver relatively varies the transmission output of the data signal to a high level or a low level, and the second transceiver receives the data signal and stores the data signal in the memory unit when the level of the transmission output of the data signal is low, and sends the data signal from the memory unit to the display unit when the level of the transmission output of the data signal is high.