These are Limited Edition noise isolation Metro Fi2 Earphones by Ultimate Ears! Make your XMp3i sound even better with these personal earphones that use the same technology as hi-end earphones most musicians use while performing.
The titanium coated audio drivers reproduce incredible bass and crisp clear highs. The earphones come with interchangeable ear tips so you can pick the correct size tips that fit your ear for the best comfort possible.
They also provide great noise isolation, which makes these a must for the air traveler.