EP0421B Features Superb sound quality 3.5 mm in-ear design Built-in microphone to freely talk with your friends Comes with a 1.2 m cable General Specs Brand & Model JBM A8   Sound Normal sound Type In-ear earphones Microphone Yes Volume Control N/A Drive Unit 8 mm Impedance  16 ohms Sensitivity 118dB Frequency Response 50-20000Hz Connector 3.5 mm audio jack Cable Length 1.2 m Compatibility Digital devices containing a 3.5 mm audio jack