Description
Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced - armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones. ER4 earphones were the first high-fidelity, noise isolating in-ear earphones to use this technology in a consumer earphone, and are recognized as the world leader for response accuracy to which all other earphones are compared.
Shipping times may be extended. Certain items might require special ordering or pre-ordering. Please contact us at 1-866-MUSIC-03 before purchasing.
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Specifications
SKU:ER4SR
MPN: 214953
UPC:846430002012
Weight: 0.93lbs