First Alert SCO5CN 2 AA Batteries Operated Photoelectric Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMCO210)

First Alert BRK SA4121B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Silence Button (Upgraded to SM6W01)

BRK Electronics First Alert 7010 120V AC Hardwired Photoelectric Smoke Alarm (Upgraded to SM100V-AC)

BRK Electronics First Alert SCO500B OneLink Wireless Battery Smoke/CO Combo Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert 100S 120V AC Hardwired Ionization Smoke Alarm with Strobe Light for Hearing Impaired (Upgraded to SM110LED-AC)

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

BRK First Alert SMCO500V (1046815) Interconnect Battery-Operated Smoke & CO Alarm with Voice

BRK Electronics First Alert 8120BL 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

First Alert BRK SA100B 120V AC Hardwired Ionization Smoke Alarm with Strobe Light for Hearing Impaired (Upgraded to SM110LED-AC)

BRK Electronics First Alert HD6135F 120V AC/DC Hardwired Heat Alarm (Upgraded to HD6135FB)

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

First Alert 9120BFF 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SM6W01)

First Alert SC9120BFF 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SC6W01)

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 5919 120V AC Hardwired Photoelectric Smoke Alarm (Upgraded to SM100V-AC)

BRK Electronics First Alert 9120LB 120V AC/DC Hardwired with 9V Lithium Battery Backup Ionization Smoke Alarm (Upgraded to SMI105-AC)