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. The faster you know about a fire, the faster you can start moving your family outside. The FG250B battery powered alarm works exceptionally well by using ionization sensor technology to detect fast flaming fires that spread quickly, such as a grease or wastebasket fires. Plus, this alarm emits an 85 dB horn and Red LED light when smoke is detected. The First Alert, Family Gard FG250B Smoke Alarm is an essential product in protecting your home and family. Hinged cover for easy battery replacement. Lighted power and alarm indicator. Silence feature. 9-Volt battery operated.