Kidde Carbon Monoxide Alarm with 3 AA alkaline batteries is a sleek, lightweight battery-powered CO alarm provides long-term protection against the dangers of deadly carbon monoxide and provides continuous monitoring of CO levels; the 10-year sensor lasts longer than most other CO alarms. This slim, easy-to-use alarm is ideal for use in all living areas and can be installed on a wall or ceiling or used freestanding on a table or shelf. It is also easily portable so can be taken away on holidays or used on boats or in caravans.