Ensure your Aico Ei450 Smoke and CO2 Detector remains in top condition with this genuine replacement test button. Designed specifically for the Ei450 model, this test button is a crucial component for maintaining the reliability and efficiency of your alarm system. It comes in a sleek white finish, seamlessly integrating with your existing detector. The button is powered by battery, making it easy to install without the need for wiring. With a long expiry date you can be confident in the performance and durability of this replacement part, providing peace of mind that your detector will continue to function at its best.