Koss UR20 Stereophone, Dynamic Element for extended frequency response Closed leatherette ear cushion for maximum isolation and deep bass. Built for maximum durability for DJ and recording use Straight, single entry 8 foot cord - Black - Mini-phone stereo 3.5 mm connector Koss Everywear Solo Stereophone - Great Sound Meets Lightweight Comfort. The Solo features contemporary styling and a simple design. At just over six ounces, these headphone wear comfortably even after hours of listening. The headband is adjustable to ensure a comfortable fit for any head size or shape. The Solo includes a single-entry four-foot cord, perfect for use with portables, Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. A 3.5mm (1/8") plug, L-shaped to minimize cord stress, and a 6.3 mm adapter are included.With its high quality sound performance and enhanced bass, the UR21v is ideal for listeners seeking headphones with a big sound that wears comfortably and travels light. The UR21v is equipped with dynamic elements for an extended frequency response from 20-18,000 Hz. Anisotropic ferrite magnets mean the UR21v can really turn up the volume, even with low-voltage portable devices. Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. To improve bass performance, block outside noise, and minimize sound leakage, closed leatherette ear cushions seal lightly around the ears. An inline volume c