SM19A1 Audio Details Technical Specifications Handheld Microphone with Keypad (IP54)Ergonomically designed handheld microphone with large programmable keys and emergency call button for ease of use and convenience.Find a dealerHighlightsFunctionsAccessories for SM19A1 Included as standard with SM19A1Systems that work with SM19A1Technical SpecificationsMicrophone sensitivity -21dB ±3dB @1KHz, impedance ≤ 2.2KΩ, PTT cycles ≥100000, operating temperature -30°C to +65°CRelated Products MD782