Kidde Smoke Detector 10-Year Battery White

Photoelectric sensor technology senses visible fire particles, associated with smoldering fires. Operates on a 10-year lithium battery, eliminating the need for battery replacement, while providing reliable detection during a power failure. End of life chirp notifies you when the alarm needs to be replaced. Smoke alarm automatically activates when it is attached to the mounting bracket. Test-Hush button makes it easy to test the smoke detector and silence false alarms that occur from cooking or shower steam. UL listed.