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Originally the metal parts of headphone speakers were made of iron, which made for poor sound quality. Today they are normally ferrite or neodymium, which are both compound materials that include iron and other elements.JR-E209 Metal Wired Earphone Red :3.5mm gold plated plug No game sound delay Comfortable to wear All metal cavity l..

Comfortable half in-ear design, painless to wear, stable, and anti-sliding. High sensitivity microphone, high definition call, free to control the karaoke/game live sound.Features:14.2mm large composite membrane speaker, accurate sound analysis, lossless high audio sound.Comfortable half in-ear design, painless to wear, stable, and anti-sliding.Thr..