Audio Technica ATH-M20x Professional Headphones with Falcon XM4 Professional Voice Cord Microphone Bundle This bundle includes Audio Technica ATH-M20x Professional Headphones and a Falcon XM4 Professional Voice Cord Microphone Bundle Advanced build quality and engineering 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils Tune for enhanced low-frequency performance Circumaural design contours around the ears for excellent sound isolation in loud environments