To provide a display device for carrying out two-way radio communication with an electric apparatus.

As the display device, a liquid crystal display device 1 carries out two-way radio communication with an electric apparatus main body 7. The liquid crystal display device 1 includes a spectrum spread receiver 3 for receiving and demodulating a signal transmitted from the electric apparatus main body 7, and an FSK transmission unit 6 for carrying out FSK modulation of a signal generated from an input unit 14 and transmitting it to the electric apparatus main body 7. The liquid crystal display device 1 carries out full duplex communication with the electric apparatus main unit 7.