BRK Electronics First Alert 4120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SMI100-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 SC6120B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Carbon Monoxide Combo Alarm (Upgraded to SMICO100-AC)

BRK Electronics First Alert 2002RAC 120V AC/DC Hardwired with 9V Battery Backup Photoelectric Smoke Alarm (Upgraded to SM100V-AC)

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 8120BL 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm (Upgraded to SMI100-AC)

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

BRK Electronics First Alert 5919 120V AC Hardwired Photoelectric Smoke Alarm (Upgraded to SM100V-AC)

BRK Electronics First Alert CO5120B 120V AC/DC Hardwired with 9V Battery Backup Electrochemical Carbon Monoxide Alarm (Upgraded to CO5120BN)

BRK Electronics First Alert SCO500 OneLink Wireless Battery Smoke/CO Combo Alarm with Voice (Upgraded to SMCO500V)

BRK Electronics First Alert 83RI 9V DC Battery Operated Ionization Smoke Alarm (Upgraded to SMI100)