This Aico smoke alarm is an essential addition to any home to ensure your safety in case of a fire. The Ei141RC model is a mains-powered smoke alarm with a battery backup feature, so you can be confident that it will alert you in case of an emergency. The alarm is designed to detect smoke using ionisation technology and has aexpiry date of 2030. It does not come with a battery included. This smoke alarm is perfect for anyone looking for a reliable and effective way to protect their home and loved ones from the dangers of smoke and gas. Product does not come in original box.