Brand: Koss. MPN: UR20. Enjoy your favorite tunes in complete privacy with these Koss UR20 Full-Size Over-The-Ear Headphones Black. Equipped with leatherette ear cushions these Koss over-the-ear headphones are quite comfortable and deliver maximum outside noise isolation for your listening pleasure. Featuring an impedance of 32 ohms combined with a dynamic element they provide a clear crisp sound at many different frequency levels. These Koss UR20 headphones are built for long life and have a 3.5mm plug as well as a long cord for user convenience.