... acoustic 2.good quality 3.Convenient to use 4. CE, ROHS, FCC hot sell good quality new technology best price two-way radio earphone ... 1.Talk and speak without holding Radio2.PTT with ... in our factory, Our main product is two way radio earphone, SPK&MIC, motorcycle earphone for two way radio, noise cancel earphone, wireless earphone, wireless PTT, computer earphone, MP3 earphone ...