... 4. CE, ROHS, FCC best sell new technology acoustic earpiece for two way radio 1.Talk and speak without holding ... fuction3.Soft rubber earhook convinence to use.4.Available for Icom,standard,Yaesu,Motorola,transceivers and other brands. ... 2mmFrequency response20-16000HzSensitivity56dB±2dBImpedance2.2K Ω intercom earphone pictures HXKK Technology LimitedHXKK founded at 2004, localed in Long hua,BaoAn ...