SM18N5 Audio Details Technical Specifications Remote Speaker Microphone with Emergency Call Button (IP67)IP67 compliant remote speaker microphone with emergency alarm capability and swivel metal clip for ease of use.Find a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -42dB ±2dB @1KHz, speaker sensitivity 90dB ±3dB @300Hz - 3KHz average, impedance 16Ω ±15% @1.5KHz, rated power 1W, maximum power 2W, operating temperature -30°C to +65°C