The PX-AR alarm relay is an output and input module that can be wirelessly integrated into a PX-1C radio smoke detector group. In the event of an alarm, the PX-AR controls external applications via cable, such as acoustic or optical signal devices, ventilation systems, roller shutter systems, or home automation systems. In conjunction with a trigger button, the acoustic alarms of networked PX-1C radio smoke detectors can be manually activated through the alarm relay. The device features a built-in long-life lithium battery and can operate independently of the power grid.