Second-generation self-developed 14.5mm in-ear planar driver| 1m thin diaphragm Titanium + Aluminum dual-coating patented technology | 28 nm-grade process technology | 0.055mm ultra-fine traces | 14 N52 neodymium magnets on each unit |Tesla valve patented bass enhancement acoustic technology | Lightweight 6.5g per unit | Specially designed for comfort | Rosewood/Black walnut versions available | 4 strands totaling 392 wires of silver-plated copper cable | Hi-Res Audio certified