Product Description:<br />1. Material: plastic<br />2. Frequency response: 40-16KHZ<br />3. Impedance: 250  &#177; 30% (at1KHZ)<br />4. Sensitivity: -42dB &#177; 3 dB<br />5. Plug: 3.5<br />6. Wire diameter: 4mm<br />7. Microphone: about 21 * 5 cm / 8.27 * 1.97 in<br />Cable Length: about 150 cm / 59.05 in<br />