BRK Electronics First Alert SC9120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO100-AC)

BRK Electronics First Alert 4120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SMI100-AC)

First Alert SC9120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO100-AC)

BRK Electronics First Alert 4120 120V AC Hardwired Ionization Smoke Alarm (Upgraded to SMI100-AC)

BRK Electronics First Alert 4919 120V AC Hardwired Ionization Smoke Alarm (Replaced by BRK SMI100-AC)

BRK Electronics First Alert 4120SB 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Silence Button (Upgraded to SMI100-AC)

BRK Electronics First Alert CO5120BN 120V AC/DC Hardwired with 9V Battery Backup Electrochemical Carbon Monoxide (CO) Alarm

BRK Electronics First Alert SCO2B 9V Alkaline Battery Operated Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO100)

BRK Electronics First Alert CO250B 9V DC Battery Operated Tamper Resistant Electrochemical Carbon Monoxide (CO) Alarm

BRK Electronics First Alert SC9120LBL 120V AC/DC Hardwired with Lithium Battery Back Up and Locked Battery Drawer Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO105-AC)

BRK Electronics First Alert SLED177 120V LED Strobe Light AC Hardwired Hearing Impaired

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

BRK Electronics First Alert HD6135FB 120V AC/DC Hardwired with 9V Battery Backup Thermistor Heat Alarm

BRK Electronics First Alert SC7010B 120V AC/DC Hardwired with 2 AA Batteries Backup Photoelectric Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMCO100V-AC)

First Alert SC7010B 120V AC/DC Hardwired with 2 AA Batteries Backup Photoelectric Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMCO100V-AC)

BRK Electronics First Alert SC6120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO100-AC)