POA104-Ex Audio Details Technical Specifications Atex Intrinsically Safe Helmet Earpiece with MicrophoneComplying with requirements for instrinsic safety, this single speaker earpiece with microphone for a helmet enables easy and safe operation whilst working in challenging environments.Find a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -42dB ±3dB @1KHz, PTT cycle ≥100000, speaker sensitivity 103dB ±3dB @1KHz, impedance 32Ω ±15% @1KHz, rated power 10mW, maximum power 20mWRelated Products PD792i-Ex