Audio-Technica ATH-M50xDG Limited Edition Professional Headphones - Dark Green Amplifier Bundle - Includes FiiO A1 Portable Headphone Amplifier All Items Are Brand New - Includes Audio-Technica USA Warranty Special edition dark green color, with brown headband and earpads Includes A1 Portable Headphone Amplifier Critically acclaimed sonic performance praised by top audio engineers and pro audio reviewers Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coils, Exceptional clarity throughout an extended frequency range, with deep, accurate bass response, Circumaural design contours around the ears for excellent sound isolation in loud environments