SM16A2 Audio Details Technical Specifications Portable Microphone (IP67)Rugged, reliable and IP67 compliant portable microphone ensures excellent peformance in challenging environments. For use with repeater and mobile radiosFind a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -21dB ±3dB @1KHz, impedance ≤ 2.2KΩ, PTT cycles ≥100000, operating temperature -30°C to +65°CRelated Products RD982i RD982i-S MD782i