Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display

Protects during a power failure - carbon monoxide alarm contains a 9V battery backup in case of plug-in failure Easy installation - plug can be installed in any outlet of your home; or use the attached extension cord to place on a table or shelf Peace of mind - when CO detection is normal, a red dot appears in the lower right corner & blinks; includes a test button Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm & memory storage UL Certified, 10-year limited warranty