The Aico Ei3016 Mains Powered Optical Smoke Alarm is a reliable and essential home security device that provides peace of mind against potential fires. With an expiry date of April 2037, this smoke alarm is hardwired for continuous power and features a battery backup for added safety. The sleek white design and compact dimensions make it easy to install in any room, while the optical sensor detects smoke quickly and efficiently. Make sure your home is protected with this Aico smoke alarm.