Cosonic CD-602MV Headphones, + Microphone
Speaker size:30mm,
Frequency range:20-20,000Hz,
Speaker impedance:32 Ohm±15%,
Speaker sensitivity:105dB±3dB,
Microphone impedance:2200 Ohm,
Microphone sensitivity:-58dB±2dB,
Maximum power:100mw,
Standard operating voltage:4.5V,
Wire length:2.2 metres