Help ensure you and your family’s safety at home by installing the Kidde Carbon Monoxide Alarm KN-COB-DP2. This model plugs directly into a standard wall outlet making installation quick and easy. The two AA battery backup provides protection even during power outages, which is when many CO incidences occur. This Kidde alarm provides you and your family with a warning signal to protect against dangerous levels of carbon monoxide in your home. The battery backup feature provides continuous monitoring of CO levels, even during power outages when AC-only units are not providing protection. It rings a loud 85 decibel sound when it detects gas. This plug-in carbon monoxide alarm can be set up in either horizontally- or vertically-oriented outlets.