REAL-TIME KIDDE APP NOTIFICATIONS: Get alerted to CO when you’re home or away (no subscription required); sounds a loud 85-dB alarm when CO is detected; uses 2.4 GHz Wi-Fi SIMPLE SET UP: Download the Kidde app, scan the QR code on the back of the CO alarm, and plug into a standard outlet; get seamless smart home integration with Alexa-enabled devices and Google Home PLUG-IN + AA BATTERY BACKUP: Plug into a standard 120V outlet with two included AA backup batteries for coverage during power outages; rotating plug fits vertical or horizontal outlets; sleep peacefully with no low battery chirps TESTED & TRUSTED: This carbon monoxide alarm is rigorously tested to meet UL 2034, 5th Edition standards, and is ETL Listed; includes a 10-year limited warranty on alarm BUILT FOR TECH ENTHUSIASTS: This device delivers reliable carbon monoxide monitoring for everyday home use; perfect for homeowners and renters that want to check CO levels when they’re home or away, and those that need to monitor multiple properties