BEKA wireless indoor siren, red. Bidirectional battery-operated wireless siren for integration into the RFZxxxD fire detection system for acoustic signaling with max. 105 dB in the event of a fire. The signal volume of the indoor siren can be programmed via the control panel menu for 3 volume levels 70 dB (A) / 90 dB (A/ 105 dB (A)) at a distance of 1 m. Learning mode with range display using acoustic signaling. 14 wireless sirens can be integrated per RFZxxxD and assigned to the corresponding areas.