Unique SportClip design fits around the ear to eliminate the headband Ultra lightweight comfort Dynamic element for extended frequency response Soft, pliable clips for customized fit. Includes convenient carrying case for protective storage and ideal for use with portable media players. Product DescriptionFrequency Response: 60 - 20,000 HzUnique SportClipTM design fits around the ear to eliminate the headbandUltra, lightweight comfortDynamic element for extended frequency responseSoft, pliable clips for customized fitIncludes convenient carrying case for protective storageIdeal for use with portable media playersStraight, dual entry 4ft. cordBuilt to last, the Clipper is covered under Koss" Limited Lifetime Warranty - the only warranty of its kind in the stereophone industry SpecificationsFrequency Response 60 Hz - 20,000 Hz Impedance 16 Sensitivity 98 dB Distortion < 0.8% Cord Straight, Dual Entry, 4ft