The Aico Ei450 is a simple to use and sleek designed one button RadioLINK alarm control switch. This alarm control switch allows a much easier way to frequently test your alarm system from one central point. It is designed for use with RadioLINK enabled fire and carbon monoxide alarms. The controller offers functions such as test, locate alarm, and silence/hush. EAN: 5099383004731 - manufacturer-number: Ei450-1XD. This is a radio remote control for smoke detectors.