Koss R-80 Over Ear Headphones, Black 8 foot, single-entry coiled cord with 3.5 mm (1/8-inch) plug Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound Closed, leatherette ear cushions form comfortable seal around ears, enhancing bass frequencies and decreasing ambient noise Adjustable headband adapts to any head size and shape for added comfort, Limited Lifetime Warranty Dynamic element construction delivers accurate acoustic sound reproduction with a wide frequency response Dynamic Element Construction Delivers Accurate Acoustic Sound Reproduction with a Wide Frequency Response Oxygen-free Copper Voice Coils Improve Signal Transmission and Conduction for Cleaner, Clearer Sound Closed, Leatherette Ear Cushions Form Comfortable Seal Around Ears, Enhancing Bass Frequencies and Decreasing Ambient Noise Adjustable Headband Adapts to Any Head Size and Shape for Added Comfort 8 Foot, Single-entry Coiled Cord with 3.5 Mm (1/8-inch) Plug and 6.3 Mm (1/4-inch) Adapter Covered under the Koss Stereophones Limited Lifetime Warranty