- Professional headphones for daily use (about 4 hours-a-day). - Equipped with a noise-cancelling microphone that reduces the background noises. The microphone can rotate at a 330°-angle. - The earphones are compliant with the international standard for audio protection, while offering a crystal-clear sound. - Comes with an RJ-9 cord for phone connection. - The cable has a Quick Disconnect function that you can use to put aside the headphones while not in use or to connect the headphones easily to other devices (PC, smartphone...)