SM16A1 Audio Details Technical Specifications Portable Microphone (IP54)IP54 complaint portable microphone with 10-pin aviation connector to be used with mobile radiosFind a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -21dB ±3dB @1KHz, impedance ≤ 2.2KΩ, PTT cycles ≥100000, operating temperature -30°C to +65°CRelated Products HM782 Mobile Radio RD982i RD982i-S MD782i