... use.4.Available for Icom,standard,Yaesu,Motorola,transceivers and other brands.walkie talkie acoustic tube earphone speaker ... size6.0*5.2mmFrequency response20-16000HzSensitivity56dB±2dBImpedance2.2K Ωwalkie talkie acoustic tube earphone pictures HXKK Technology LimitedHXKK founded ... main product is two way radio earphone, SPK&MIC, motorcycle earphone for two way radio, noise cancel earphone, wireless ...