KN-COB-DP2 AC/DC carbon monoxide alarm plugs directly into your home's standard wall outlet making installation quick and easy. The 2-AA battery backup provides protection even during power outages when many CO incidences occur. The Kidde AC/DC carbon monoxide alarm has a 10-year limited warranty. Tamper resist feature can be activated to cause unit to go into alarm if it has been unplugged or has come loose from the outlet. 2 AA battery backup provides continuous protection even during power outages. Low battery hush - silences low battery chirp warning for up to 12-hours to maintain protection without having to replace the batteries at an inconvenient time. 10-year end of life warning alerts user to replace CO alarm after 10-years of operation, (40% longer than other CO alarms. Many cities and states have created legislation requiring smoke alarms or specific types of smoke alarms in various settings. Certain laws also specify when homes need carbon monoxide alarms or other safety products. Understanding your local requirements can help you keep your home safe from the dangers of fire. Carbon monoxide detector utilizes an electrochemical sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected. UL/CSFM reference model KN-COB-DP2.