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

Enhance your household's fire safety and enjoy greater peace of mind with the First Alert 9120B Hardwired Smoke Alarm with Battery Backup. Equipped with an ionization sensor, this 120-volt hardwired smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm. Included adapter plugs eliminate the need for re-wiring during installation, while a backup battery helps keep the unit running in case of a power outage. Designed to maximize accessibility and ease of use, this hardwired smoke detector features a single button that allows you to test and silence the alarm. And thanks to the universal mounting bracket, this smoke alarm is easy to install.