First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm With Slim Profile Design, 1-Pack

First Alert SC9120B 120V AC/DC Hardwired With 9V Battery Backup Ionization Smoke Alarm And Carbon Monoxide Combo Alarm (Upgraded To SMICO100-AC)

First Alert BRK SC-9120B Hardwired Smoke And Carbon Monoxide (CO) Detector With Battery Backup BY BUYRITE ELECTRIC

First Alert SC-9120B Hardwired Smoke And Carbon Monoxide Alarm With Battery Backup 2 Pack

FIRST ALERT BRK SC9120B-3 Hardwired Smoke And Carbon Monoxide (CO) Detector With Battery Backup, White, Pack Of 3

First Alert BRK Sc9120b 85-Decibel Ionization Hardwired Smoke And Electrochemical Carbon Monoxide Detector With Battery Backup