MT0170W Features In-ear stereo sound earphones designed for iPhone Convenient 1.2 meter cable Equipped with microphone for hands-free calling 3.5mm audio jack General Specs Brand & Model BYZ S300 Sound Stereo sound Earphone Type Wired headset Impedance  32 ohms Frequency Response 20-20000Hz Speaker Size 12 mm Sensitivity 116±3dB Connector 3.5mm audio jack Cable Length 1.2 m Compatibility iPhone Package Details Weight: 24.61 g Size: 14.00*6.6*2.00 cm Package Includes * BYZ S300 In-ear Stereo Sound Wired Earphones with Microphone for iPhone