First Alert 1039809 Hardwired Ionization Smoke Alarm with Battery Backup BESTSELLERS A thick backing plate resists

A thick backing plate resists damage and helps increase the lifespan

Running Motor HP: 1

For use on Sno-thro models with housings 26" and larger

UL listed for gasoline

while the platform helps prevent load shifting

First Alert 1039809 Hardwired Ionization Smoke Alarm with Battery Backup BESTSELLERS A thick backing plate resistsDesigned to help promote household safety, the First Alert Hardwired Smoke Alarm with Battery Backup can provide a vital early warning of fire. This hardwired smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast flaming fires. Comes equipped with an ultra reliable ionization sensor to provide the earliest possible warning of a fast flaming fire. The sensor is optimized to detect flaming fires, such as those caused by