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Amazon.com: YINYOO CCZ Melody in-Ear Monitors Earphones Headphones Wired Earbuds Without Microphone IEM HiFi Bass with 1DD 1BA, Ear fins, 4N OFC Cable for Musicians, Singer, on Stage, Studio(no mic, Clear Black) :
How exactly does an in-ear piece (the ones singers use) work? What exactly are they used for? - Quora
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BASN Triple Driver in Ear Monitors Bmaster in-Ear Headphones with Silver-Plated MMCX Cable Ideal Earphones for Musicians Sound Engineers and DJs (Dark Brown): Amazon.co.uk: Electronics & Photo
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