The K 271 MK II dynamic headphone combines the benefits of circumaural design for extreme comfort and a closed-back design for maximum isolation from ambient noise. Thanks to its XXL transducers and Varimotion technology, it delivers a clean, smooth and very rich sound. It offers a wide frequency range of 16 Hz – 28 kHz, maximum input power of 200 mW and a rated impedance of 55 ohms.It sports a switch in the headband that mutes the audio just as soon as the headphones are taken off, keeping sonic bleed completely at bay. Professional circumaural hi-fi stereo studio headphones Closed-back design Self-adjusting headband for optimum fit Patented Varimotion speakers High noise attenuation Automute feature mutes headphones when they are taken off 16 Hz – 28 kHz frequency range Max. input power: 200 mW Rated impedance: 55 ohms Gold plated stereo mini jack connector Gold plated 1/8″ to 1/4″ screw-on adapter Leatherette and velvet ear pads For onstage and studio use Single-sided, detachable 3 m cable and additional 5 m coiled cable