Detailed Product Description VHF wireless microphone 1.Ture Diversity technology,excellent receiving quality 2.Good quality compressor-expandor circit,high S/N3. Multi-Silencer circuit,avoding external noise interference4.SMD production technics Dynamic Range:>160-270MHZS/N Ratio:>105dBH.T.D.:<0.5%Receiving Sensitivity:>90dBTemperature Range:-10to 55Effective distance:>50Meters