The Kidde 30CUAR Hardwired Smoke and Carbon Monoxide Detector with AA Battery Backup is engineered to help protect against two common household hazards. With over 25% faster smoke detection*, it helps ensure early warning of fire or carbon monoxide by sounding a loud 85-decibel alert.This alarm features green, amber, and red LED lights that clearly signal power and alarm status. Advanced sensing technology reduces nuisance alarms, while a Test/Hush button allows for quick function checks and temporary silencing. Designed for simple setup, it includes an easy twist-and-click mounting bracket for seamless installation. For whole-home detection, its interconnect capability** allows multiple Kidde alarms to sound simultaneously; when one detects danger, all interconnected alarms sound together.Powered by 120V AC power, the device includes two AA batteries to help ensure continuous operation during power outages.Ideal for homeowners and safety professionals, this ETL Listed detector meets UL 217 10th Edition, UL 2034 5th Edition, and FCC standards. It is backed by a 10-year limited warranty*** from the date of purchase.*29% faster average smoke detection based on internal testing of smoldering wood fires for Kidde 9th Edition vs. leading competitor 8th Edition products.**Different models offer different interconnection options and requirements. Check the User Guide for more info.***10-year limited warranty on alarm. Not a battery performance claim.