Ensure your home’s safety with the Firechief FCB05 Carbon Monoxide (CO) Alarm, a must-have for rooms containing fuel-burning appliances such as boilers, heaters, and cookers. This advanced CO alarm is designed to provide you with peace of mind by accurately detecting harmful levels of carbon monoxide in the air, alerting you to potential dangers before they become life-threatening. Equipped with a reliable 10-year life span and powered by replaceable batteries (2 x AA batteries supplied), this alarm guarantees long-lasting protection. Features: Electrochemical carbon monoxide sensing technology - CO, heat and smoke alarms for home are essential for fire safety.