FLEXIBLE AND EXPANDABLE for Live Sound,Club Music,Conferences,Presentation,Seminars and Installations The DMSTetrad Performer Set is a professional digital 2.4GHz wireless system for license free operation with a 100mV RF power rating. The set includes the DSRTetrad digital wireless receiver and the DPTTetrad pocket transmitter. The system provides uncompressed studio quality and in addition to the bodypack transmitter the system is shipped with the C111 LP ear hook microphone and MKG L instrument cable. The receiver offers four channels in one rugged 19" housing. Its one-click pairing function gets the system up and running in seconds.