The Koss UR10 on ear headphones is a new portable model that offers maximum sound quality in a comfortable lightweight design. Today's music lovers require lightweight on ear headphones that reproduce their favorite recordings, no matter where they go. The UR10 combines the very best in sound performance without sacrificing comfort. Closed ear design for maximum isolation. 60HZ-20000HZ frequency. Dynamic components giving a high clear frequency response. Adjustable headband for best fit. Straight, dual entry 4 feet cord and 3.5mm plug.