Features: This wireless microphone system includes 2 headset microphones + 2 bodypack transmitters + 1 rack mountable receiver, suitable for public speech, classroom teaching, business meeting, etc. Adopts infrared automatic frequency synchronizing technology, receiver and transmitter can match easily and quickly; UHF 640-690MHz frequency band to avoid interference and ensure stable signal transmission. Each microphone has its own volume control knob on the receiver unit for adjusting the volume of the microphone separately to get desired vocal volume. The receiver has a 6.35mm audio mixing output to connect to speaker, and 2 balance XLR outputs for long distance connection to reduce the noise. The bodypack transmitters and receiver both have LCD display for showing the working information, which is helpful for you to use and adjust the microphone system.