Smoke and Carbon Monoxide Alarm with 10-Year Sealed Battery

The First Alert smoke and carbon monoxide alarm is a photoelectric, battery-powered detector with a sealed 10-year lithium battery, eliminating the need for battery changes and preventing nuisance chirps due to low power. It features a built-in photoelectric smoke sensor that minimizes false alarms from cooking smoke or steam, and an electrochemical CO sensor for enhanced accuracy. A single button allows easy weekly testing, and the tamper-resistant design prevents unauthorized removal. Ideal for apartments, dormitories, or hotel use, this alarm complies with Montreal's new smoke detector regulations and includes an end-of-life warning after 10 years. Loud 85-decibel alarm, sleek low-profile design, and 10-year limited warranty.