Check the listing for details. BRK Battery-Powered Ionization Smoke Detector. Condition: New. Listed at 22.95 USD. BRK Battery-Powered Ionization Smoke Detector The First Alert SMI100 Battery-Operated Smoke Alarm is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This battery-operated smoke alarm is easy to install and the front access battery compartment makes for easy battery replacements. First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency Battery-operated alarm allows for easy installation and maintenance Front access battery compartment makes for easy battery replacements End-of-life warning lets you know when it’s time to replace the alarm Test/silence button for efficient testing to ensure alarm is working properly Specifications: Brand Name: BRK Power Type: Battery-Powered Sensor Type: Ionization Product Type: Smoke Detector Packaging Type: Boxed Test and or Reset Button: Yes Number in Package: 1 pk