Hardwired smoke alarm featuring 10-year battery backup. Equipped with an ionization sensor, reliably detects smoke from fast flaming fires and alerts you with an 85-decibel alarm. Includes adapter plugs that eliminate the need for re-wiring during installation. Designed for easy accessibility with single button for testing and silencing, universal mounting bracket included for easy installation. Type: Hardwired Voltage: 120V Battery Life: Sensor Type: Ionization Dimensions: 5.6 In. W. x 2 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 Certification: UL Listed Warranty: 10-Year Limited