Classic and popular design; Process of mightness functions; Lowest price with high quality Technical specification: Headphone Trumpet40mm Impedance32Ω Frequency Response20-20KHz Sensitivity103dB Cord Length2.5mMicrophone Frequency Response30Hz-16KHz Impedance10KΩ Sensitivity58dB±3dB Input/Output Plugs3.5mmx2 Packing:Packed in gift box, 36pcs/ctnGross/Net Weight:9.5kg/8.0kgMeasurement:62*52*54cm ...