First Alert Atom Smoke Alarm

Atom photoelectric smoke alarm with a 10-year battery delivers the same advanced protection as a traditional alarm while taking up only a fraction of the space.

• Uses an ultra-reliable photoelectric sensor to detect smoke from smoldering fires while keeping false alarms to a minimum.
• A built-in 10-year lithium-ion battery provides continuous power, with no need to ever worry about changing batteries during the lifetime of the alarm.
• The SmartClip mounting system allows for easy installation on a wall or ceiling.
• A loud 85-decibel siren sounds if smoke is detected, and a convenient test/silence button lets you easily check alarm function and mute false alarms.