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 Ø6.0X3.0mmSensitivity -40dB±3dBlmpedance ≤2.2kΩDirectivity ... 20~20kHzSensitivity(S.P.L) 93dB±3dBInput Plug Diameter Ø3.5mmCord Length 2.3metersNet Weight Appr.30g Human engineering design ...