UHF 740-790MHz frequency band Channels: 200CH(L/R 100 channels are available) Superheterodyne;double frequency;conversion, with high receive sensitivity Pilot precise, interference resistance Multi-level high-performance SAW filter, with excellent anti-jamming capability Auto mute and anti-skip circuit, it completely eliminates the impact of noise when microphone;turn on and turn off; Professional Audio Output: XLR balanced output and 1 / 4 "jack unbalanced output Using AA; batteries Double step-up design, the battery charge does not affect the transmission power Manual frequency-selecting, correspond frequancy in infrared ray,automatic searching frequency. High reliability surface mount technology (SMT) production;