Mobile phone headset stereo earphone and headphone withmicrophone:

Earphone section:

Speaker diameter: 15mm

Frequance response: 20Hz--20kHz;

Impedance: 32ohms;

Sensitivity: 108dB/mw;

Wire length: 1.5meter;

Earplug: 3.5mm;

Microphone section;

Frequance response: 100Hz--10000Hz;

Impedance: 2200ω

Sensitivity: -40dB(0dB=1V/PA).