Selectable frquency -100 Channels-Dual Channel CarrierFrequency Range-510-690MHz Modulation Mode-FM OperatingRange-100M typical (inopenspace) Oscillation-PLL synthesized (Phase Lock Loop Frequency Control) Sensitivity->105dB BandWidth-80MHz T.H.D-<0.4%@1KHz Frequency response-45Hz”18KHz+3dB