We have manufactured kinds of microphone and earphone elements for almost<br/>30 years with know-how. (H-189/G, M-138G, M-139, H-250, TA-235 etc.)<br/><br/>We supply units with high quality and reasonable prices to several trustworthy<br/>companies in Korea. Indeed, we export them to U.S.A.<br/><br/>Please feel free to call us if you have any questions. (+82-032-651-1052)