beyerdynamic FX 1 Trendline Headphones (Blue) Stylish blue headphones with adjustable ear cups and soft ear pads 40 Hz to 20 kHz frequency response with 32-ohm impedance that is ideal for MP3 players Produces high intelligibility of speech for use with audiobooks or transcription 6-foot left-sided audio cable with 1/8-inch stereo mini jack plug Fold-away design for easy storage