Fiio FH3 2BA+1DD Knowles Beryllium-plated dynamic driver In-ear Earphone IEM S.TURBO Acoustic Design Alloy Shell MMCX Detachable Cable. Knowles BA drivers Beryllium-plated dynamic driver S.TURBO acoustic design Balanced pressure relief technology Expanded MMCX connectors High-purity monocrystalline silver-plated copper cable Aerospace grade aluminum-magnesium alloy shell.
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