Neodymium magnets and 40 millimeter drivers for powerful, detailed sound.Specific uses for product : Professional audio system,Home audio system Closed ear design provides comfort and outstanding reduction of external noises 9.8 foot cord ends in gold plated plug and it is not detachable; 1/4 inch adapter included Folds up for storage or travel in provided soft case Frequency Response: 10 Hertz to 20 kilohertz These large diaphragm, foldable headphones feature a rugged construction, a secure, highly effective closed ear design Connectivity technology : Wired