The Kidde Nighthawk carbon monoxide alarm aims to prevent the leading cause of accidental poisoning deaths in the U.S. With a digital readout that clearly displays CO levels and a peak-level memory that recalls the highest level of CO measured, the Nighthawk will protect your family from a threat that humans can’t see, smell, or taste in the air. This alarm also comes with three plug-in AC mounting options, along with a 9-volt battery backup. Mount a Nighthawk in your bedroom and living areas, and sleep easier knowing you’re protected. This alarm comes with a five-year warranty.