JOHAN is a sound distribution and warning system available at an optimum price that provides high-quality acoustic-signal coverage of both exterior and interior areas. It is designed as a stand-alone device and its output range can vary from 300 to 2,400W.

JOHAN broadcasts common notifications and warning signals (Default warning announcements and signals recorded in the internal memory) both in interior and exterior areas on the basis of the following:

• Direct input from a microphone, or from a local control module;
• Instructions from a supervisory computer via VEKTRA control software;
• Automatic triggering by external inputs – data from various sensors, buttons;
• Direct input from other communication systems – mobile phones, fixed phone lines, radio stations, VHF radio, satellite communication systems etc.;

The system meets the requirements of the STN EN 60849 standard related to emergency acoustic systems and it is equipped with battery back-up as standard equipment.