First Alert SA305CN3 Smoke Alarm with Long Battery Life

Experience hassle-free operation and peace of mind with the First Alert Ionization Smoke Detector. The included long-life lithium battery supplies power to the smoke alarm for maintence-free operation and easy istallation. A tamper-proof side drawer has an optional lock that prevents the battery from being removed without the proper tool. Ionization smoke-sensing technology is ideal for quick detection of flash fires, usually caused by accelerants or cooking. If danger is detected, a loud 85-decibel siren will trigger, alerting the household.