SM18A1 Audio Details Technical Specifications Remote Speaker Microphone (IP67)Reliable, sturdy and IP67 compliant remote speaker microphone for outdoor use with DMR RD962i repeaterFind a dealerHighlightsFunctionsTechnical SpecificationsMicrophone sensitivity -42dB ± 3dB @1KHz, speaker sensitivity 93dB ±3dB @300Hz to 3KHz average, impedance 8Ω ±15% @1.5KHz, rated power 1W, max power 1.5W, operating temperature -30°C to +65°CRelated Products RD962i