The JD3 earbuds are designed for audiophiles who want the best possible sound quality on the go. They feature a large 9.2mm dynamic driver with a composite diaphragm, which produces deep bass, lush mids, and vibrant treble. The dual-cavity internal structure was carefully designed to reduce standing waves and improve bass transient performance. They also feature a neodymium magnet with high magnetic flux and a voice coil made of CCAW for high sensitivity and clear mids. The balanced pressure relief system eliminates pressure on your eardrum and allows you to listen longer without discomfort. Besides listening to the music the way the artist intended, the JD3 also includes line controls allowing you to place calls, play/pause music, and adjust the volume to your liking, an HD microphone, and an aluminum alloy audio plug.