Professional over-ear, closed headset that is a standard for intercom, ENG/EFP work and video production, and based on the successful K271 MKII studio headphones combined with a rugged dynamic microphone with hypercardioid polar pattern. The flexible microphone arm mutes the microphone automatically as it is moved up. The microphone can be mounted to the left or right side, depending on personal preference and available space. The headset features a switch in the headband that mutes the audio just as soon as the headphones are taken off. The headset also features a switchable bass-cut filter which minimizes rumble and wind noise and leatherette velvet ear pads. Audio frequency bandwidth: 16 Hz-28 kHz. Sensitivity: 104 dB SPL/V. Rated impedance: 55 Ohms. Dimensions: 110 x 205 x 200 mm.