The Aico EI261ENRC Mains and Lithium Battery Carbon Monoxide Alarm is a reliable and efficient home security device designed to detect carbon monoxide in your living space. With a rechargeable battery backup, this alarm ensures continuous protection even during power outages. Compatible with Google Home and X10 smart home protocols, it can be easily integrated into your smart home setup for added convenience and peace of mind. Made in the United Kingdom, this white alarm from Aico provides a safeguard for your safety and the safety of your loved ones.