First Alert ELECTRONICS 9120B 120V Smoke 9V CO Detector

First Alert Hardwired Smoke Alarm w/ Battery Backup in Gray | 2.25 H x 5.69 W x 5.69 D in | Wayfair

BRK 9120B Smoke Alarm, Ionization Sensor, 85 dB @ 10 ft Audible Alert, 120V AC,

First Alert 9120B 120 Volt Hardwired Smoke Alarm With Battery Back Up 1 Pack

BRK Hard-Wired w/Battery Back-up Ionization Smoke/Fire Detector

First Alert 9120B 120 Volt Hardwired Smoke Alarm with Battery Back Up Single Button Test / Silence Latching Alarm Indicator Smart Technology