Etymotic ER4-XR Earphones Extended Response

The Etymotic ER4 XR Earphones Extended Response deliver the highest response accuracy of any in ear headphones with the extra low end enhancement for users who love bass. Offering nearly 100 percent noise isolation the ER4 XR Earphones block out most sounds and completely seal the ear meaning you can reduce the risk of listening at unsafe levels. With a professional and reliable build the Etymotic ER4 XR Earphones are guaranteed to last....Read More...»»