UHF Lavalier Microphone Set SK-XSW Bodypack Transmitter EM-XSW 1 UHF Receiver ME2-2 Lavalier Microphone Antenna-Switching Diversity Reception Automatic Frequency Management Selectable UHF Frequencies Up to 10 Compatible Channels Integrated Antennas 2 x AA Batteries are Included NT 12-5 CT Power Sup..