The next step in the Koss ProDJ series, these 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. The flexibility to change cords on the go is easy with a new detachable cord design. Included with every ProDJ200 headphones are a standard, professional grade 2.4m (8') coiled cord and a 1.2m (4') straight cord equipped with Koss Touch Control (KTC) remote and microphone technology. The KTC is made for iPhone, iPad and iPod and is compatible with other smartphones and devices. The KTC also allows users to stay connected, shuffle songs and control the volume with a flick of a switch.