This Aico smoke alarm is a reliable and efficient device that will keep you safe in case of a fire. It is a mains powered smoke alarm with a battery backup feature, which means that it will continue to function even in the event of a power outage. The alarm is designed to detect smoke and trigger an alarm in case of a fire. The Aico Ei141RC smoke alarm has an expiry date of 2028 and is suitable for use in homes, furniture, and DIY projects. It is important to note that this smoke alarm does not come with a battery included. The alarm is easy to install and can be used in a variety of settings to keep you safe. Product does not come in original box.