Abstract: A security system for a home having one or more security zones. A main station is associated with the home and, when initialized, constantly monitors the state of remote intruder sensors throughout the home. Upon receipt of a signal from one of the intruder sensors, the main station activates an alarm and also stores an alarm value representative of the zone in which the intruder sensor was activated. A remote station includes a radio transmitter which, upon activation by a person about to enter the home, generates an interrogation signal to the main station. Upon receipt of the interrogation signal by the main station, the main station checks for the presence of the alarm value. If the alarm value has been set, indicative that an intruder sensor has been activated, the main station flashes exterior lights on the home thereby warning the person of the possible presence of an intruder within the home.