Help protect your home and family with the addition of a carbon monoxide alarm. Carbon monoxide (CO) is an ordorless, coloreless, and tasteless gas. The only way to know its presence is through a carbon monoxide alarm. At home, sources of carbon monoxide include gas- and oil-burning appliances such as furnaces, dryers, water heaters, ovens, wood-burning stoves, charcoal grills and automobiles. Safety professionals recommend having at least one carbon monoxide alarm on every level of the home and near each sleeping area. Carbon monoxide (CO) is an odorless, colorless, tasteless gas. At home, sources of carbon monoxide include gas- and oil-burning appliances such as furnaces, dryers, water heaters, ovens, wood-burning stoves, charcoal grills and automobiles. Basic battery powered - easy battery replacements. Tested to the highest industry standards for safety. 7 Year Limited Warranty - Replace alarm after 7 years.