Driver Dia:15mm/12u Frequency Respond:200Hz-20KHz Impedence:32?0% Sensitivity:120dB?dB/1khz Rated power capability:10mW 1.In-ear type stereo earphone 2.High tone fidelity,high sensitivity 3.Dynamic stereo sound immerses you in your music 4.Stylish streamline design and excellent sound quality 5.Retractable and strong cable are portable to carry and place This product suit to many kinds of mobile phone. Very hot selling now!!! Welcome your consultation!!!