Wireless dual vocal set. Includes (2) SKM 835-XSW handheld transmitters with mute switch and e 835 capsule (cardioid, dynamic), (2) MZQ 1 microphone clips, (1) EM-XSW 1 DUAL two-channel stationary receiver with internal antennas and (1) NT 12-5 CW power supply, frequency range: BC (670-694 MHz)