Description:? Description: You are looking at an excellent Sound Isolating Earphones which compatible with all iPod / MP3/MP4 and portable video/audio devices . Get it and experience a musical journey anywhere anytime. Specification: 1.2m OFC Oxygen-free electrolysis copper wire super-soft wire.           14 mm diameter drivers? Frequency response:20－20 000Hz Sensibility:108dB/mW        ? Impedance: 32 ohms