Radio microphones (also referred to as wireless microphones or cordless microphones) are small, low power (<50 mW) transmitters designed to be worn on the body or handheld, for the transmission of close, personal sound. The receivers are more tailored to specific uses and may range from small and portable to rack mounted modules, as part of a multichannel system.
Source: ERC REPORT 42 [1.006 KB]
See also ERC REPORT 63 [83 KB]
'INTRODUCTION OF RADIO MICROPHONE APPLICATIONS IN THE FREQUENCY RANGE 1785 - 1800 MHz'