5-in-1 Carbon Monoxide Detectors, Combination Natural Gas Leak Detector and Carbon Monoxide detectors Plug in with 9V Battery Backup, Travel Carbon Monoxide Detector with Voice Brightness Control Feyejade The outer shell of the

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5-in-1 Carbon Monoxide Detectors, Combination Natural Gas Leak Detector and Carbon Monoxide detectors Plug in with 9V Battery Backup, Travel Carbon Monoxide Detector with Voice Brightness Control Feyejade The outer shell of theAbout this item Upgraded 5 in 1 Carbon Monoxide Detectors and Gas Leak Detector This Combination gas and carbon monoxide detector Built CO, Gas, Temp, Humidity and Sound, Brightness Control in one detector, Compact design, deliver fast, accurate detection to keep your safety. 9V Battery Backup Function A 9V battery backup can be installed to avoid the hassle of power outages. (9V Battery Not Included) 3 Level Control Sound & Brightness This portable