Make your home a safer space with the Honeywell R200C-N Carbon Monoxide (CO) Alarm. Carbon Monoxide (CO) is an invisible, odorless, and tasteless gas that is toxic to humans and animals. Faulty appliances and environmental changes can cause carbon monoxide poisoning in the home, with potentially fatal consequences. This CO alarm is designed for all types of homes, including leisure accommodation, guest houses, and caravans. It is battery operated and easy to fit, with options for wall or ceiling mounting. The low-power chip allows it to last for 10 years in standby mode.