Patent ID: 8478475

Claim:
A vehicle-mounted electronic appliance having a vehicle state detection portion detecting a vehicle being parked, a sound indication portion, a sound indication control portion, and a current location detection portion detecting a current location, characterized in that the vehicle-mounted electronic appliance further has an external power supply connection portion, an internal power supply, and a power supply control portion, and receives electric power from the external power supply via the external power supply connection portion, the vehicle-mounted electronic appliance further has a theft-prone area storage portion storing theft-prone area data, and an area discrimination portion, and when the area discrimination portion detects that the current location detected by the current location detection portion is within a theft-prone area stored in the theft-prone area storage portion, and in addition the vehicle state detection portion detects that the vehicle is parked, the sound indication control portion makes the sound indication portion indicate a warning to watch out for theft, and the power supply control portion switches source of supply of electric power from the external power supply to the internal power supply.