KOSS Porta Pro Classic headset

Features - Whether you´re listening at home or on the go, the Koss Porta Pro delivers all the excitement of a live performance. - The ultimate portable headphones with a collapsible headband design for protective storage. - Adjustable temporal pads relieve pressure on the ears. - The ultra portable on-ear headphones - Comfort Zone setting on temporal pad for comfortable secure fit - The ultimate active headphones with a collapsible headband design for protective storage - Dynamic element for extended frequency response - Oxygen-free copper voice coils deliver deep bass and signal clarity - Includes a convenient carrying case for protective storage - Covered under the Koss Stereophones Limited Lifetime Warranty - 15-25,000 Hz - 60 ohms - 101 dB SPL/1mW - Straight, Dual Entry, 4ft