1.Earphone,mp3 ,compute,pc, headset,Neckband,headphone , easy to carry; 2.Comfortable all-inclusive probe covers, 1Earphone,mp3 ,compute,pc, headset,Neckband,headphone Mic Dimensions Ø9.7X4.5mmSensitivity -40dB±3dBlmpedance ≤2.2kΩDirectivity OmnidirectionalDriver Diameter Ø30.0mmlmpedance 32ΩFrequency Response 20~20kHzSensitivity(S.P.L) 108.0dB±3dB(at1KHz)Input Plug Diameter Ø3.5mmCord Length 2. ...