DESC: Based on the closed-back dynamic HD 280 pro headphones the HMD 280 pro headset has been especially designed for communications in high-noise environments. Its dynamic super-cardioid microphone has been optimised for close talking distances.Features:Noise-compensati on microphone with extremely low handling noiseMicrophone can be worn on either left or right hand sideEasily replaceable single-sided coiled cableVery good attenuation of background noiseNominal headphone impedance 64ohmTerminated with tinned leads