For music professionals such as DJs, these Koss headphones provide the ultimate experience, with easy-to-use features and high performance. The Koss Pro DJ100 headphones are full-sized and are great at isolating noise, filtering out everything but the music. These over-the-head headphones fold flat for increased portability and have an 8-ft (2.44-m) coiled cord with a 3.5-mm standard plug and a 6.5-mm adapter. With these Koss headphones, the mere flick of a switch takes the sound from stereo mode to mono. DJs and other professionals of the music industry will no doubt appreciate the deep bass and signal clarity delivered by the oxygen-free copper voice coils in the Koss Pro DJ100 headphones. The spun metal ear cups on these over-the-head headphones are stylish and also swivel 180 degrees, allowing ease in switching from single- to double-ear listening. Not only are these Koss headphones high-performance, they also are comfortable to wear even over long periods.