The AKG K 121 Studio are entry level professional headphones for various applications, as Project Studios and Home Recording.These semi-open, supraaural headphones are a true allround performer. The AKG self-adjusting headband ensures good comfort.The K 121 Studio are equipped with a 3.5/6.3 mm stereo adapter and is designed for ambitious and rugged use. The leatherette ear pads are easy to clean.