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Microphone:
| Frequency Response Range | 300Hz-3400Hz |
| Alternating current impedance | 2200 ohm ( 1kHz) |
| Sensitivity | ≥-22.5db (1kHz) |
| Directivity | “8” shape |
this is high quality copper Mandril,used in the Millitary headset .so depends its high standard workmanship.
micro mylar speakerM4013