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Etymotic ER4-SR In-Ear Isolating Earphone with Replaceable Cable

Etymotic ER4-SR In-Ear Isolating Earphone with Replaceable Cable
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Product Features

Enhanced accuracy with greater sound output and flat response ACCU-Driver balanced-armature, precision-matched, custom-tuned drivers Braid-reinforced cable for enhanced durability and low microphonic effect ACCU-Filter user-replaceable filters protect the balanced-armature drivers from ear wax Industry-exclusive channel-matching compliance graph Ear Canal Headphone