Product information: Voyetra Noise Cancelling Headphones - SilverWhy put up with noisy engines, crowds, or traffic when trying to hear your music? These noise canceling ear buds are the perfect companion for MP3 and CD players, portable radios, PC audio, or portable DVD players. Tune-out noise with the flick of a switch, then sit back and quietly enjoy your movies or music. Each ear bud includes a built-in microphone with special circuitry that monitors noise in your listening environment and subtracts the signal from the sound fed into the ear bud diaphragms. This results in a great deal of the external background noise being eliminated from the music you're enjoying. The buds are perfect for reducing annoying background noise while you travel on airplanes or trains or even to quiet down noisy areas such as at the office, workplace or noisy room at home.