Features: This wireless microphone system includes 2 headset microphones + 2 bodypack transmitters and 1 receiver with LCD display. Using UHF 630-690MHZ band to avoid interference of other frequency, stable to use. Adopts advanced digital pilot frequency technology, can work simultaneously in several rooms without interference. The receiver with 2 XLR balanced output jacks for connecting speakers or other audio devices and 2 control knobs for adjusting the volume of the microphone separately. Effective transmission range in open area is about 80 meters, suitable for public speech, ballroom karaoke, home entertainment, classroom teaching, business meeting, etc.