Nighthawk™ AC Plug-in Carbon Monoxide Alarm KN-COB-DP-LS | Kidde
Kidde 5DCO / Nighthawk NHDCO 10 Year Digital Carbon Monoxide Detector / CO Alarm | eBay
This CO detector could save your life—and it's less than $20 on Amazon
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural & Explosive Gas Detector, AC-Plug-in with Battery Backup, Digital Display, White & Smoke Detector, Battery Powered with Test Button - Amazon.com
The silent killer: Omaha Fire reiterates importance of carbon monoxide detectors