Technical specification:
<br />1.Product Name: Headband Headphones
<br />2.Plug Connector: 3.5mm
<br />3.Frequency:20-20KHZ
<br />4.Impedance:16 
<br />5.Sensitivity: 93dB
<br />6.Cable length:1.2m
<br />7.Built-In Microphone: Yes
<br /> 
<br />Package Include:
<br />1 X Headphone(without retail box)