Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-in with Battery Backup, Digital Display, Pack of 2 & Smoke Detector, Battery Powered Smoke Alarm with Test Button, Battery Included,(Pack of 1) - Amazon.com
Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display - Carbon Monoxide Detectors - Amazon.com
Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-in with Battery Backup, Digital Display, Pack of 2 & Smoke Detector, Battery Powered Smoke Alarm with Test Button, Battery Included,(Pack of 1) - Amazon.com
Nighthawk™ AC Plug-in Operated Carbon Monoxide Alarm with Digital Display - ND Safety Council
Change smoke detector batteries when you 'fall back' for DST
The Best Carbon Monoxide Detectors of 2023 - Tested by Bob Vila