Professional in-the-ear earphones championed by audiophiles, musicians and recording engineers. 

"The next best thing to live music"—the flanged ear tips seal the music inside your head while shutting out outside noise.

Used sparingly over the years (and not since iPhones no longer required plug-in headphones/earphones). The replacement ear tips and filters are brand new and have never been used. 

Etymotic Research says, "MicroPro earphones provide the highest external noise isolation of all earphones" and "reduce noise naturally. They slide in your ears like earplugs to block out external noise, allowing you to hear every recorded detail." No batteries required.

These high-tech earphones work and sound great! Zero damage.

Buyer will receive:

* ER-4 MicroPro earphones

* 5-foot cord 

* 3.5mm adapter (see photo 12)

* 6 3-flange ear tips (4 new, stored in plastic case)

* 6 foam ear tips (new), plus 2 more stored in pouch (See photo 9)

* Filter changing tool and 6 new replacement filters (see photo 10 & 11)

* Accessory purchased separately: Smartwrap by Sumajin clip that lets you neatly wrap up the cord and secure it, with instructions (see photos 13 & 14)

* Etymotic Research zippered soft pouch for earphones (see photo 4), with net enclosure for replacement ear tips 

* Plastic Etymotic plastic storage case, clasped shut. Some of the interior foam lining is separating from the foam base.

* Original cardboard slipcover