KIDDE Worry-Free Smoke Detector 10 Years Battery Life, Standalone Smoke Alarm, Photoelectric Sensor, Sealed Lithium Battery Power Fire Alarm Features • UL Listed;  • Audio Alarm - 85dB at 10ft; • Photoelectric Sensor - detect visible particles (associated with smoldering fires) sooner than ionization alarms; • Lifespan - 10 years; • Battery - Sealed-in lithium battery, last for 10 years; • Hassle-free - no battery replacement required over the 10-year life of the alarm; • End of Life Warning - Alarm chirps every 30 seconds alerting you to replace the unit; • Hush™ feature - to silence nuisance alarms; • Ideal for the living area / hallway. How To Install? • A battery-powered smoke detector installation is simple, and anyone can install one themselves; • A easy-to-follow installation guide will be provided as well; • The installation takes about 5 minutes. What's In The Box? • Smoke detector with sealed-in lithium battery, Screws, Wall plug, User Guide. #kiddefiresafety #smokealarm #authorizeddistributor #trusafesecurity