The Ei Electronics EI450 RadioLink Alarm Controller Aico is a reliable and efficient smoke alarm controller designed for home security. With its battery backup feature and sleek white colour, this alarm adds an extra layer of safety to any home. The controller, which operates on batteries, ensures that the smoke alarm is always functional even during power outages, providing peace of mind for homeowners. The Ei Electronics brand is known for its quality products, and the EI450 lives up to this reputation, making it a trustworthy choice for protecting against smoke hazards in the home. Expiry 2031 hence the price.