The ATH-M50xBT brings the coveted sonic signature of the critically acclaimed ATH-M50x professional studio headphones to a wireless, on-the-go design. Features Bluetooth wireless technology, proprietary 45 mm large-aperture drivers, and built-in mic and controls. Sound-isolating earcups fold in for easy transport. Up to 40 hours of use on a full charge. Includes cable with mic/controls and carrying pouch.