The full-size Koss ProDJ100 headphones are the choice for professional DJs and music lovers alike. With stylish spun metal ear cups that swivel 180 degress, shifting between single and double-ear listening is a breeze. Transitioning from stereo to mono audio mode is as simple as a flick of a switch. These headphones feature soft, closed cushions that create a perfect seal and are amplified by extreme bass response. Lightweight and long lasting with noise isolating qualities, these professional headphones even fold flat for the ultimate in portability.