KEY FEATURES Two wireless Handheld Microphones with balanced output. Multi-channel high band anti-interrupting wave;thereby eliminating interference successfully. PLL-synthesized fixed, working separately even if used even at the same time. Companding design to expand effective range. Eliminates feed-backs and noise and mostly reduces chance of interference. Sensitive receiving design with antennas positioned at the front of the receiver. Perfect performance gear for church, musical concerts and many more. Operating Distance: 150 meters