First Alert is the category leader in fire safety and delivers reliable life safety products that help our consumers protect what matters most through innovation and performance. Working smoke alarms cut the risk of dying in a home fire by 50% and that's important because a home structure fire was reported every 86 seconds. Whereas carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until it???s too late. Symptoms of carbon monoxide poisoning are like the flu and you might not even know you're in danger. The PRC710B 10-Year alarm comes with 2-in-1 protection to detect the CO you can't see, smell or taste in the air, as well as first signs of a potential fire. It works exceptionally well by using photoelectric sensor technology to detect smoldering fires that create a flameless form of combustion. This alarm has a low profile, slim design that blends into any decor. It also comes with a locked, 10-Year battery backup and gives an end of life warning to notify you when the alarm needs replacement. This First Alert PRC710B Smoke and Carbon Monoxide Alarm is an essential product in protecting your home and family.