... to use 4. CE, ROHS, FCC hot sell good quality new technology best price two-way radio earphone 1.Talk and speak ... response20-16000HzSensitivity56dB±2dBImpedance2.2K Ω two-way radio earphone pictures HXKK Technology LimitedHXKK founded at 2004, localed in Long hua,BaoAn,Shenzhen ... core,quality as focal point. We producing &sells our reliable,new design products. In one word, customer’s satisfaction has ...