This is a fine pair of earphonesfrom Altec Lansing with excellent sound isolation properties for those who listen to music while on the move. The earphones serve as ear plugs effectively blocking out outside noise (passive noise reduction) and allow you to listen to music at lower volumes that you otherwise would in a noisy environment. Whats more they leak very little sound so the person sitting next to you is not disturbed by what you are listening to. Sound quality is really good and well balanced and the construction is sturdy with a strong chord. They come with a 2 year warranty. Overall a excellent purchase if you listen to music while on the move. Buy Now.