SM19A2 Audio Details Technical Specifications Handheld Microphone with KeypadHandheld Microphone with KeypadFind a dealerHighlightsFunctionsAccessories for SM19A2 Included as standard with SM19A2Systems that work with SM19A2Technical SpecificationsMicrophone sensitivity -21dB ±3dB @1KHz, impedance ≤ 2.2KΩ, PTT cycles ≥100000, operating temperature -30°C to +65°CRelated Products MT680 PLUS