BRK Electronics First Alert PRC710B Low Profile 10 Year Sealed Battery Operated Lithium Power Tamperproof Photoelectric Smoke and Carbon Monoxide Combo Alarm (Upgraded to SMCO210)

BRK Electronics First Alert RM4 120V AC Hardwired Smart Relay

BRK Electronics First Alert SA303B 9V DC Battery Operated Ionization Smoke Alarm (Upgraded to SM601)

BRK Electronics First Alert SA3210 Dual Sensor DC 10-Year Sealed Lithium Battery Powered Photoelectric and Ionization Smoke Alarm (Upgraded to SM310)

BRK Electronics First Alert SA350B 10 Year sealed Lithium Battery Powercell Operated Dual Ionization Smoke Alarm (Upgraded to SMI110)

BRK Electronics First Alert SA4121C 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

BRK Electronics First Alert SA4919 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

BRK Electronics First Alert SA4919C 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

BRK Electronics First Alert SA500 OneLink Wireless Battery Smoke Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert SA501 OneLink Wireless Battery Smoke Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert SA511 OneLink Wireless Battery Smoke Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert SA511B OneLink Wireless Battery Smoke Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert SA520 120V AC/DC Wireless OneLink Smoke Alarm Bridge Unit (Upgraded to SA520B)

BRK Electronics First Alert SA520B 120V AC/DC Wireless OneLink Smoke Alarm Bridge Unit

BRK Electronics First Alert SA86B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

BRK Electronics First Alert SA86C 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)