IP4388B Features Soft faux leather construction， comfortable to wear Superb stereo sound effects Built-in microphone for hands-free calling Convenient 1.5 meter cable Universal 3.5mm plug Features volume control function General Specs Brand & Model Kanen iP-2000  Sound Bass stereo sound Earphone Type Wired headphones Drive Unit 40 mm Sensitivity 105dB ± 3dB Impedance 32ohms ± 15% Frequency Response 20Hz-20KHz Microphone Yes Volume Control Yes Connector 3.5 mm audio jack Cable Length 1.5 m ± 10% Compatibility PC computers， cell phones， iPhone， iPad and other audio devices equipped with a 3.5mm audio jack Package Details Weight: 377.71 g Size: 24.5*19.5*7.5 cm