The BRK First Alert 9120B Smoke Detector is a reliable and durable smoke alarm that operates on both battery power and hardwired power, ensuring continuous protection even during power outages. This white smoke detector has a compact design with a 4-inch diameter and 2-inch depth, making it easy to install in various locations. Manufactured by BRK, a trusted brand in home safety, this smoke alarm has a battery backup feature for added peace of mind. With an operating sound rating of 1 and a power source specific for smoke detection, this alarm is a essential component for keeping your home secure. (Some Boxes Might Be Damaged Due Storing But The Unit Are 100% New Units)
eBay