Help protect your home and family with an ADT Carbon Monoxide Alarm. Initiate optional ADT professional monitoring services, receive alerts, or set lights and other connected devices to turn on and off when carbon monoxide is detected in your home. Includes an 85dBm alarm siren. Requires an ADT Security Hub, plus one or more compatible ADT devices. ADT professional monitoring services may not be available in all areas and may require permitting or additional service fees.