The Aico Ei3016 Mains Powered Optical Smoke Alarm is an essential safety device for any home, designed to detect smoke and alert occupants in case of a fire. It features a battery backup system, ensuring that the alarm will function even in the event of a power outage. This smoke alarm is hardwired for permanence and ease of use, with a sleek white design that complements any home decor.Measuring 15.5 cm in width and 6.2 cm in depth, the Aico Ei3016 is easy to instal and fits unobtrusively in any room. Its optical sensing technology is highly reliable, and the alarm's loud audible warning provides clear and effective notification. This model, with the MPN EI3016, is a trustworthy addition to any household's safety measures.