Conference microphone SY-370 pickup type: type of Adapter: Phi 9.7 back pole capacitor type style of capacitance frequency response frequency response: (100-12K) Hz point of polar Pattern: heart-shaped Heart-Style output impedance output an Impedance:600 + 30% non balance unbalance sensitivity Sensitivity:-45dB + 3 dB reference to collect distance between reference Sound-Receiving distance (20-50 cm power supply power Supply:DC 3V
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