Kidde – The KN-COB-B-LS-CA is a 3AA battery-operated carbon monoxide alarm that uses electrochemical sensing technology to protect you and your family from the dangers of carbon monoxide. The battery-operated CO alarm provides continuous monitoring of CO levels and includes multiple mounting options, allowing for installation on a wall or tabletop. The KN-COB-B-LS-CA is suitable for all living areas and has a 10-year limited warranty.