EP0091B Features High sound effect 3.5mm plug in-ear style Noise isolation earphone Enjoy your music anywhere General Specs Brand AWEI  Model ES900I Sound Excellent sound effect Earphone Type In-ear style Impedance  16Ω±15% ohms at 1kHz Frequency Response 20～20000HZ Sensitivity 110DB±3DB Drive 11.5 mm Cable Length 1.2 m Connector 3.5 mm audio jack Package Details Weight: 83.46 g Size: 18*10*3 cm Package Includes * Earphone