Simple headphones with great sound quality. Detachable cable with gold-plated connectors is compatible with most audio devices including iPhone, iPad, iPod. You always can take it with you and use for communication because the cable has a built-in microphone. Ear cups are easily to fold and it makes this headphone to be very convenient for transportation.Audio System Type:  HeadsetConnectivity Technology:  CableDriver Diameter:  40 mmMount Type:  Head-bandAudio Output Mode:  StereoSensitivity:  113 dBImpedance:  32 ΩHeadphones Technology:  DynamicFrequency Response:  20Hz-20kHzMicrophone Form Factor:  In-CordHeadphones Interface Connector Type:  Mini-phone Stereo 3.5 mmCable Length:  1.2 m