Headphone technology parametersTitle: metal zipper headsetType: in-ear stylePlug Type: 3.5MMCable Length: 1.2MLine center Material: enamelled copper wireSpeaker Impedance: 9UHeadphones Sensitivity: 116DB Rated frequency: 2MWFrequency range: 20--200HZHeadset type: binaural stereoApplicable models: the perfect support for Iphone4 / 4S / 5、 millet、 Samsung、 HTC and all 3.5mm jackMicrophone: Built-inCall key: own、 through controls on the headset to answer or hang up the phone (the phone must support、 HTC long press to hang up)Additional features: voice dialing and listening to FM stereo radio (mobile phone must support)Wire selections: volume controlNo standard jack: 3.5mm standard headphone jack with Mark can call