Etymotic MicroPro ER-4S Stereo Earphone Cable Stereo 1 x 3.5 mm Mini-phone Stereo Ear-bud ER4S

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ER-4S Stereo earphone have the most accurate frequency response for reproducing CD and MP3 recordings. The sensitivity is comparable to home and professional earphones. ER-4S Stereo earphone are ideal for home stereo use and computer use. ER-4S Stereo earphone can be used with a Earphone amplifier when using low power portable devices. ER-4S is the earphone preferred by musicians and audiophiles.

Model: ER4S