Help protect your children, pets, and family with the Kidde plug-in COPDLG Carbon Monoxide + Explosive Gas (natural gas and propane) Detector. This 3 in 1 alarm sounds an 85 decibel alert when detecting low or dangerous CO levels and warns occupants of elevated natural gas or propane, with the backlit display showing current CO levels or "GAS". Low-level CO detection is especially important for children, elderly, pregnant women, and pet owners, so you can act sooner.* Designed for convenience, this plug-in carbon monoxide detector operates on standard 120V power with included AA battery backup to maintain detection during outages. The rotating plug allows flexible installation in vertical or horizontal outlets for easy placement. The digital backlit display clearly shows real-time CO levels, while intuitive controls include a Test/Hush button for quick system checks and silencing nuisance alarms. This plug-in CO alarm provides comprehensive gas detection, helping monitor multiple hazards in one device for added peace of mind. Tested to meet UL 2034 5th Edition standards and ETL Listed, this plug-in carbon monoxide detector and explosive *Children, elderly adults and pets are more vulnerable to low levels of carbon monoxide and may be affected faster.