Universally applicable radio transmitter and receiver module for integrating various input and output devices into the PROTECTOR hazard detection system. Bi-directional radio networking with forwarding of an alarm signal from detector to detector (repeater). Group formation, e.g. for separating fire compartments: - Formation of max. 8 groups within a building. - Max. 30 detectors per group can be networked wirelessly. With LED display and buzzer to indicate different operating states.