The Aico Ei3016 Mains Powered Optical Smoke Alarm is a reliable and essential home security device. With an expiry date of May 2037, this smoke alarm provides peace of mind for you and your family. It is hardwired with a battery backup, ensuring constant protection even during power outages. The alarm operates at a loud 90 dB sound rating and is compatible with Google Home for added convenience. Made in the United Kingdom by the trusted brand Aico, this smoke alarm is a quality product that you can depend on for 10 years with its manufacturer warranty.