First Alert SA9120BCN Smoke Detector

First Alert AC/DC Smoke Alarm - 120-volt AC (alternating current) smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires and alerts you with a loud 85-decibel alarm. Designed to be wired directly into home's electrical system, features a backup battery that helps keep the alarm functioning even in the event of a power outage. Battery life varies according to use and application. Gasket-less mount helps ensure a perfect alignment for easy installation, while tamper-resistant locking pins keep the alarm secure. Includes a convenient test/silence button, to easily check whether the alarm is functioning properly and mute false alarms. Integrates with up to 12 other First Alert or BRK hardwired alarms and features a latching indicator that identifies which unit triggered the alarm. - Type: Hardwired, Voltage: 120V, Battery Life: Varies According To Application, Sensor Type: Ionization, Dimensions: 5.6 In. W. x 1.9 In. H. x 5.6 In. L., Battery Back-up: Yes, Alarm Type: Smoke, Decibel Level: 85dB, Battery Type: 9V Battery, Batteries Included: Yes, Color: White, UL Listed: Yes, Warranty: 10-Year Limited, Pkg Qty: 1, Package Type: Clamshell This item is banned in the following states: MA,MD,VT