SOMIC High-performance audio for discriminating music lovers Premium 50mm driver for audiophile sound Velvettouch ear pads for extended wear Acoustic air vent for enhanced bass Self-adjusting padded headband for superb comfort Tangle-free singleside cord Driver: 40mm, impedance: 32hms, sentivity: 102 dB/mW Frenquency: 20-20kHz, Magnet: Neodymium Cord length: 2.5-4m, Plug: 3.5mm glod plated