Radio microphone `` KMS-7 ''.Microphones.MicrophonesThe KMS-7 radio microphone has been in serial production since the beginning of 1966. The microphone is designed for wireless transmission of the voice of a lecturer, singer, speaker, etc. It consists of a microphone itself, a transmitter and a receiver. The microphone provides a frequency range of 100 ... 8000 Hz. The range is 50 ... 150 meters. The duration of the continuous operation of the KMS-7 microphone from batteries is ~ 30 hours.