Headphones - headset, around the ears, closed construction, 3,5mm Jack, 6,3mm Jack, frequency range: 30 Hz-20000 Hz, sensitivity: 97 dB/mW, impedance: 32 Ohm, cord length of 2,5m The Koss UR / 20 is a closed, robust and affordable mid-range headphone for home listening. They have closed earbuds for more intense bass, but they are also perfectly insulated from ambient noise. However, the headphones are also flexible and have a lightweight construction. In short, your head will be sitting very well.High quality headphones for uninterrupted listeningThe Koss UR/20 is a closed, robust and affordable mid-range headphone for home listening. They have closed earbuds for more intense bass, but they are also perfectly insulated from ambient noise. However, the headphones are also flexible and have a lightweight construction. In short, they will sit comfortably on your head.This photo is disabled from the color box and will not be displayed in it.Koss UR / 20This photo...