BRK has been the top choice of contractors in the commercial market for over 50-years. Marketed to builders, electrical contractors serving single family, multifamily, hotel/motel, RV and manufactured homes channels. The contractor-friendly product and packaging design sets the professional standard. 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 7010B hardwire alarm works exceptionally well by using photoelectric sensor technology to detect smoldering fires that create a flameless form of combustion. Sources of these fires include cigarettes burning in couches or bedding. This alarm comes with 9-Volt battery backup and a single test and silence button. This BRK 7010B Hardwire Alarm is an essential product in protecting those who matter most. Photoelectric smoke sensing technology. Latching alarm indicator. Single button test/silence. 9-Volt battery backup. OptiPath 360 degree technology allows 360 degree access to the layer of air on the ceiling or wall that carries the fire signatures (smoke, combustion particles and volatile components). Locking feature for tamper resistance. 85 dB alarm. America's most trusted brand in home safety.