True diversity UHF wireless conference system. Automatic channel scan. Automatic frequency search. Infrared frequency synchronizing of receiver and microphone unit. Pilot tone. Priority switching. Automatic and manual gate modes. Security lock. RS-232 interface for external control. Set consisting of: 1 receiver, 4 microphone bases and 4 gooseneck microphones. Frequency range operation 823 - 832 MHz + 863 - 865 MHz.