Equipped with a dual balanced armature driver and a compact design that fits perfectly and comfortably in the ears, the ATH-CK10 is one of the top-quality in-ear headphone on the market. With its high-impedance design, the ATH-CK10 Stereo Earphone can also provide truly impactful bass. The cord fits comfortably and securely around the ears. Ideal for use with all audio sources, including MP3 and other portable players, this is supplied with small, medium and large interchangeable earpieces for a comfortable, custom fit.