BRK First Alert SMI100 (1046832) Battery Operated Ionization Smoke Alarm (Upgraded to SM601)

BRK Electronics First Alert 9120B-48B 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm - Saving 48-Pack (Upgraded to SM6W01)

BRK Electronics First Alert GCO1B 120V AC Plug-in Explosive Gas/CO Combo Alarm

BRK Electronics First Alert CO250B6CP 9V DC Battery Operated Tamper Resistant Electrochemical Carbon Monoxide (CO) Alarm - Contractor 6-Pack

BRK First Alert SMCO100V-AC (1046781) Interconnect Hardwire Photoelectric Smoke & CO Alarm with Battery Backup & Voice

BRK Electronics First Alert CO250LB 9V DC Lithium Battery Operated Tamper Resistant Electrochemical Carbon Monoxide (CO) Alarm

BRK First Alert SM300-AC (1046759) Interconnect Hardwire Dual Sensor Photoelectric and Ionization Smoke Alarm with Battery Backup

BRK First Alert SM110V-AC (1048322) AC/DC Hardwired with Lithium Battery Back Up and Locked Battery Drawer Photoelectric Smoke Alarm

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

BRK Electronics First Alert CO615B 120V AC/DC Plug-in with 2 AA Batteries Backup Electrochemical Carbon Monoxide (CO) Alarm with Digital Display (Upgraded to CO7P01D)

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

BRK First Alert SMCO410 (1048325) Z-WAVE Plus Smart Smoke & CO Alarm works with Ring

BRK First Alert SMCO110V-AC (1046791) 120V AC/DC Smoke and Carbon Monoxode Combo Alarm with 10-Year Sealed Lithium Battery Backup and Voice

First Alert BRK SA4120 120V AC Hardwired Ionization Smoke Alarm (Upgraded to SM6W01)

BRK Electronics First Alert 9120B-48P 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm - Box 48-Pack (Upgraded to SM6W01)

BRK Electronics First Alert ZCOMBO-G Two 1.5V AA Battery Operated Photoelectric Smoke and Carbon Monoxide Combo Alarm (Upgraded to SMCO410)