The FS20 PIRA is movement detector with battery operation which can be used flexibly, with integrated, adjustable automatic dawn system. It issues switching commands via radio over up to 100 m to any receiver in the FS20 house control system. It saves having to lay cables, which is otherwise often difficult or not possible, & can be used very quickly when required. The switching commands can be transmitted to two separately configurable channels, so that the detector can execute different tasks at the same time.