Features: This wireless microphone system is including 2 handheld mics and 1 receiver with dual LCD display. Using UHF band frequency 620-690MHz, switchable 50 channels per microphone, 100 channels in total. Adopts infrared automatic synchronizing technology for quick and easy connection of microphone and receiver. The receiver with 2 control knobs for adjusting the volume of the microphone separately. With two XLR balanced and one 1/4 audio mix unbalanced output interfaces.