The Kidde 900-0284 AC/DC Carbon Monoxide Alarm is a plug-in unit equipped with a ten-year sealed backup battery and a digital display for easy monitoring. This alarm is designed to alert you to dangerous levels of carbon monoxide in your home, ensuring your safety. It features a compact design that fits easily into any outlet, making installation a breeze. The digital display provides real-time readings of CO levels, while the sealed battery ensures uninterrupted protection for a decade. This unit complies with safety standards, making it a reliable choice for any household.