<ul><li>Model : E21</li><li>RGB fixed color and dazzling light</li><li>Anti profiteering and lightweight suspended head beam</li><li>Adaptive headwear + adjustable earmuffs, no pain after wearing for a long time</li><li>Comfortable, breathable and high elastic PU leather cover</li><li>50mm polymer composite membrane unit</li><li>360 degree adjustable HD microphone</li><li>Independent keys and pulleys adjust volume and microphone</li><li>Virtual 7.1 Surround Sound</li><li>USB Audio Interface</li><li>Frequency Response : 20hz - 20Khz</li><li>Driver Diameter : 50 mm Dynamic</li><li>Directivity : Omnidirectional</li><li>Microphone Sensitivity L -38 +- 3db</li><li>Cable Length : .1.8 meter</li></ul>