: Etymotic ER-4P Portable In-Ear Earphones

 : Etymotic ER-4P Portable In-Ear Earphones
: Etymotic ER-4P Portable In-Ear Earphones Detail
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: Etymotic ER-4P Portable In-Ear Earphones Description

The ER-4P MicroPro noise-blocking earphones from Etymotic Research offer realistic sound reproduction and noise isolation that far surpasses that of active noise-canceling earphones. The ER-4P earphones–which require no batteries–can be plugged into any audio source. They can be used with portable CD, MP3, DVD, and other players without an additional amplifier. The ER-4P earphones were designed to match the response of the ear, creating nearly perfect sound reproduction. They reduce ex…

The ER-4P MicroPro noise-blocking earphones from Etymotic Research offer realistic sound reproduction and noise isolation that far surpasses that of active noise-canceling earphones.

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 : Etymotic ER-4P Portable In-Ear Earphones

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