Description:<br>   Brand Name: HUAST  Model Number: HUAST-40  Type: In-ear and Stereo Headphone With TF\/FM  Micphone:yes  Driver unit:30mm  Mic Diameter: &amp;Phi; 10mm  Audio interface: 3.5mm  Cable length: 1.15 m  Impedance: 32&amp;Omega;  Sensitivity: 113dB\/mW  Frequency Range: 12-22000hz  Frequency response range: 20HZ-20KHZ  Power Capability:35mW  Rated Power:20mW  Optional color: Black，White，Red，Blue  Compatible with: Android， iPhone，PC，tablet pc or MP3  Features:     1.Built-in microphone.  2.In addition to headset itself covers is equipped with two different types of earmuffs.  3.This headset equlpped with a 360 degree rotation headset clip.   4.Small in-ear design， tie-in and transparent soft glue earmuffs， fit your ear type， wearing more comfortable.   5.3.5mm gold-plated plug for multiple platforms.  6.Integrated microphone and remote control of the line of control.    <br>Package Included:<br>1x HUAST-40 Metal Stereo Earphone