First Alert SMICO100, Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency, Provides reliable 2-in-1 protection against both smoke and carbon monoxide, End-of-life warning lets you know when it’s time to replace the alarm, Battery-operated alarm allows for easy installation and maintenance, Test/silence button for efficient testing to ensure alarm is working properly