Brand: Koss. MPN: R80. Dynamic element construction delivers accurate acoustic sound reproduction with a wide frequency response   Adjustable Headband Adapts to Any Head Size and Shape for Added Comfort   Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound   Dynamic Element Construction Delivers Accurate Acoustic Sound Reproduction with a Wide Frequency Response   Closed, Leatherette Ear Cushions Form Comfortable Seal Around Ears, Enhancing Bass Frequencies and Decreasing Ambient Noise   Covered under the Koss Stereophones Limited Lifetime Warranty   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   8 Foot, Single-entry Coiled Cord with 3.5 Mm (1/8-inch) Plug and 6.3 Mm (1/4-inch) Adapter   8 foot, single-entry coiled cord with 3.5 mm (1/8-inch) plug