First Alert Battery Powered Ionization Smoke and Fire Alarm With Mute Feature

This battery powered ionization sensor smoke alarm is most sensitive at detecting fast flaming fires. A single button mutes false alarms, and also tests alarm functions. Alarm cover is hinged for easy access battery replacement without having to remove the alarm from the ceiling or wall. Alarm comes equipped with a tamper resistant locking pin to prevent battery removal. Perfect for rented rooms and basement apartments.