Hardwired smoke alarm, with 10 year 9v battery back up, 120v, equipped with ionization sensor, reliably detects smoke from fast flaming fires & alerts you with 85 decibel alarm, includes adapter plugs adapter plugs that eliminate the need for re-wiring during installation, designed for easy accessibility with single bottom for testing & silencing, universal mounting bracket included for easy installation, 10 year limited warranty, note: please check your local building code requirements before installing this product to determine compliance with applicable standards.