NRR(noise reduction ratings): 24 dBS
Microphone Type: Amplified Noise Cancelling Electret Microphone
Microphone Frequency Response: 300 Hz --8k Hz
Speaker Type: Dynamic
Speaker Nominal Impedacnce: 300 ohm
Speaker Frequency Response: 150 ohm --20k
Plug: Microphone: 5.2 φ plug
Earhpone: 6.3 φ plug
Earseals: TPU
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