MI0191W Features Popular DJ shape elegant fashionable design Fully enclosed shroud-like headset， wear confortable， noise isolating effect High quality magnet， bringing strong site effects Lightweight headset shell， through the drop test， can use for long life Noise reduction microphone， call clarity and smooth effect  General Specs Type Wireless Headset/Headphone Mic Dimensions 2x4mm Directivity All angles Impedance  32Ω Speaker Diameter 40mm Frequency Response 20-20KHz Audio Plug 3.5mm Powerful Way to Cancel Noise Initiative to reduce noise Package Details Weight: 303.88 g Size: 15.5*13*7.5 cm