1. Creative zipper design, easy to shrink and unfold, never be wound.
2. Call answering function with microphone, one click to pause playing, double click to play the next piece of music, triple click to play last piece.
3. Soft ear plugs, ear hooks perfect fit, comfortable to wear with ease.
4. Good stereo sound quality, more impactful bass, more solid and stable mids and treble, more pure voice