Monaural, 600 Ohm headphone offers quality sound reproduction, comfort, and durability. The mylar element responds quickly to high and low frequencies. The permanently attached 6 ft coiled cord has built-in strain and stress relief. Padded headband is adjustable to fit any size head and keeps its shape even with heavy use. The soft, padded, vinyl ear cushions isolate students from outside distractions and are removable for cleaning.