Kidde Fire Combo Smoke/Carbon Monoxide Alarm - Wireless - Visual - Green, Red - White
Home Carbon Monoxide Visual and Alarm Gas Leaking Detector - China Co Gas Leaking Detector, battery Operated Gas Detector | Made-in-China.com
GZAIR CO Carbon Monoxide Detector with Visual, Audible, and Vibrating Alerts, Handheld CO Monitor, Portable CO Gas Alarm for Home and Travel, Battery Operated, Alarm Logger, X-1 - Amazon.com
GZAIR Travel Carbon Monoxide Detector, IP67 Waterproof Portable CO Gas Alarm for Vehicle, Aviation, Camping, Visual, Audible, and Vibrating Alerts, 2-Year Battery Life - Amazon.com