Unique conductor configuration for sound quality tuning perfect for headphones: φ0.14 inches (3.5 mm) to A2DC; Adopts high purity copper wire 6N-OFC + OFC. Twist construction reduces noise. Transparent PVC sheath for soft and convenient maneuvering. High rigidity aluminum sleeve with knurling process; Flexible wire ensures a secure fit to your ear; Adopts an A2DC connector plug designed specifically for audio. Specifications: Conductor: 6N-OFC+OFC Wire Resistance: 29 0 mΩ/m Cable Length: 4.6 ft (1.2 m) Input Plug: φ0.1 inch (3.5 mm) Gold Plated Stereo Mini Plug (Large) Output Plug: φ0.1 inch (3.5 mm) Gold Plated Stereo Mini Plug Recommended Models (As of November 2016): ATH-LS400, ATH-LS300, ATH-LS20, ATH-LS70, ATH-LS50