Carbon monoxide (CO) is a colorless, odorless, deadly gas. It can be emitted by sources including gas or oil furnaces, gas clothes dryers, water heaters, fireplaces, wood stoves, charcoal grills, gas ranges, and space heaters. A clogged chimney, improper venting, and attached garages can also cause carbon monoxide accumulation. Installing carbon monoxide alarms near heating stoves, kitchens, bathrooms, boiler rooms, etc. can help detect carbon monoxide leaks in a timely manner. This carbon monoxide detector is a reliable and easy-to-use device designed to protect you from the hazards of carbon monoxide. It has a highly sensitive electrochemical sensor that can detect even the smallest amount of carbon monoxide and emits an audible alarm when the detector is triggered. The device is powered by a replaceable 3x1.5V AA battery ,the carbon monoxide detectors is equipped with LED Digital Display, which can provide clear and easy to read detector status information and carbon monoxide concentration. It also comes with a test button that allows you to test the functionality of the detector without causing any error alarms. Carbon monoxide detectors are essential equipment for any household, and fire safety experts recommend using them to help prevent carbon monoxide poisoning. Includes: One carbon monoxide alarm, user’s manual. 12-months Warranty.