ZF4KTHY Noise Cancelling Headphones Wired Headphone

How to use: plug and play Specifications:Item Type:Test Headset Product Material:ABS,PU:Microphone sizes: approx. §9.7 x 4.5mm / 0.4 x 0.2" Direction: unidirectional supercardioid: -50¡À3db S/N Radio: >55dB Impedance: ¡Ü 2.2K¦ Microphone pole length: approx. 23cm / 9.1" Speaker: diameter: approx. ?40mm / 1.6" Impedance:32¦ 15% Power:100mW Frequency Response:20Hz-20kHz Output Sound Pressure(S.P.L):96dB¡À3db Plug Type:USB2.0 High Speed Package Contents:1 x Headphone Customer Questions and Answers