... ROHS, FCC hot sell good quality new technology best price two-way radio earphone 1.Talk and speak without holding ... ,standard,Yaesu,Motorola,transceivers and other brands. two-way radio earphone speaker Speaker size15mmSpeaker size Sound pressure ... 5.2mmFrequency response20-16000HzSensitivity56dB±2dBImpedance2.2K Ω two-way radio earphone pictures HXKK Technology LimitedHXKK founded at 2004, localed in ...