Cheap Earphone

Headphone:

-Drive unit: 30mm
-Impedance: 32 ohm
-Frequency: 20-20, 000Hz
-Sensivity: 105dB

Microphone:
-Polar pattern: Omni-directional
-Frequency response: 40-16KHz
-Sensitivity: -56dB± 3dB
-Jack: 3.5mm