Features:Microphones size: Φ9.7×5.2mmSensitivity: -52dB ± 3dB Directivity: Unilateral directivityOperating voltage: 2.0V Impedance: 2.2k Frequency range: 100-16kHz SNR: greater than 60dBCable:90cm/35inchPlug Type: 3.5mmColor:blackHeadset Microphone Using tips 1.Directional microphone, make sure the microphone above holes (sponges can be seen taking down) alignment mouth2..Distance from the mouth of the most suitable microphone is 10-15mm 3.Put the microphone plug into the corresponding socket on the host (and not into the audio input jack hole) 4.Before weraing the Ear-hanging micropone,please don't turn on the power and volume4.Try to avoid multiple plug microphone plug, so as not to cause poor contact