AEGISLINK Smoke and Carbon Monoxide Detector 10-Year Lifespan with Replaceable Battery, Photoelectric Fire Alarm and Electrochemical CO Alarm with Test/Silence Button, SC200, 1-Pack - Amazon.com
Honeywell Carbon Monoxide Detector - Residential Use (C8600A)
Brand New Honeywell 5800CO Wireless Carbon Monoxide Detector, CO, Exp: Jan 2033 781410882768 | eBay
Honeywell 5800CO Wireless CO Detector | Alarm Liquidators