USI Electric Combination Smoke and Carbon Monoxide Alarm, Battery Powered, 10-Year Sealed, Photoelectric

The Universal Security Instruments MPCH322S Hallway Battery Operated 2-in-1 Photoelectric Smoke and Carbon Monoxide Alarm provides 10-years of continuous protection against deadly threats in the home. The utilization of Photoelectric Technology allows for increased efficiency in detecting slow smoldering fires. This USI 2-in-1 Alarm has also been equipped with a CO detector that's capable of sensing the presence of carbon monoxide in the surrounding area. Perfect for new or replacement installations, this maintenance-free alarm is suitable for houses, apartments and mobile homes. The sealed battery (included) will never have to be replaced throughout the life of the alarm, giving you a decade's worth in peace of mind even in the event of a power outage. The Universal Security Instruments MPCH322S 2-in-1 Photoelectric Smoke and Carbon Monoxide Alarm is ETL listed to UL Standard UL 217 and UL2034. This USI Alarm is also California State Fire Marshal approved.