Audio-Technica ATH-M3X headphones offer you a closed-back dynamic design. 40mm high-performance drivers and low-mass diaphragms. Maximized power handling capability. Excellent isolation and powerful bass. 20Hz-21kHz frequency response. 9.8' cable with 3.5mm stereo mini-plug. NOTE: We've made a special buy on this manufacturer's overrun. Your headphones will come packaged in plain bubblepack and do not include a manual. By foregoing the normal factory packaging, you save a bundle!