I have many smoke alarms and they all linked together per code. Since I build the home 4 years ago, the alarms been going off average 4 times a year just for few seconds but multiple time per occurrence. When I turn the circuit breaker off, it happens too. When the battery needs to be replace, only the one which need battery will sound not the entire house. Thanks!:(

You may be able to see a red led indicating the triggering detector.