PURPOSE: To reduce the wear of a battery by supplying a battery power to a drive control circuit only when a remote control signal from a transmitter is received.

CONSTITUTION: A power supply circuit 14 is provided between a power terminal VDD of a reception control circuit 15 and a battery power supply 19. The power supply circuit 14 starts its operation when a reception circuit 13 receives a remote control signal and after a prescribed time, its operation is stopped and when a signal is received by the control circuit 15, the circuit 14 supplies power for a prescribed time only. The control circuit 15 discriminates the propriety of the reception signal inputted to an input terminal SDI and when the signal is a correct data, a relay drive signal is outputted from an output terminal RC to a chime drive circuit 17. Since the power supply to the control circuit 15 is reduced only at the reception of signal in this way, the wear of the battery is saved remarkably in comparison with the case of a conventional circuit.