Etymotic Etymotic - ER4 XR Extended Response In-Ear Headphones - Black

Enjoy optimal music clarity with these Etymotic extended-response earphones. A frequency response rate of 20Hz - 16kHz ensures uniform sound within a wide range, and a maximum output of 122dB lets you crank the music loud. These Etymotic extended-response earphones are noise isolating to reduce surrounding sounds for better clarity.