... , FCC hot sell good quality new technology best price two-way radio earphone 1.Talk and speak without holding Radio2 ... 0*5.2mmFrequency response20-16000HzSensitivity56dB±2dBImpedance2.2K Ω two-way radio earphone pictures HXKK Technology LimitedHXKK founded at 2004, ... factory, Our main product is two way radio earphone, SPK&MIC, motorcycle earphone for two way radio, noise cancel earphone, wireless ...