Microphone: High Sensitivity Ceramic MIC. Element 1 pc

     Compressor level: High: 45 dB, Med: 30 dB, Low: 10 dB
     S / N Ratio (Graphic Equalizer): 80dB
     Distortion factor (Graphic Equalizer) 0.05% (at flat)
     Graphic equalizer: 4 elements (270,540,1000,2000Hz) + 12dB range
     Output voltage COMP: 0-30mV (RMS)
     Output impedance: 500 ohms - 100K ohm
     Power supply: DC 6 ~ 9 V
     Power consumption: At Equalizer "OFF" Receiving: 3.5mA, Transmitting: 4.5mA / At Equalizer "ON" Receiving: 10mA, Transmitting: 11mA
     Sound of the alarm: Approx. 4.5KHz Intermittent Tone
     Dimensions: 227 X 130 X 320 mm
     Weight Approx: 1000g