Shenzhen Epoch Technology Co., Ltd.  

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headphone:
Drive unit: 27mm
Frequency response: 20-20kHZ
Impedance:32 ohm Sensitivity: 95db+-3db

Microphone:Polar
pattern: Omni-directional
Frequency response: 40-16kHZ
Sensitivity: -56db+-3db
Jack: 3.5mm*2