Help keep your home and family safe with this First Alert SA304CNA Battery Powered Smoke Alarm. It features an escape light to help guide you to safety in the event of an emergency, an ionization sensor for smoke detection, and a loud 85-decibel alarm. It also includes a convenient single test/silence button for fast muting in the event of nuisance alarms from cooking smoke or shower steam. The battery-powered alarm doesn't require wiring to install and continues to monitor your home even if there's a power failure. The alarm has an easy-access side battery drawer, so there's no need to remove the alarm from the ceiling to change the battery.