Kensington Noise Cancelling Headphone for iPhone 4S - Black

Take the noise out of noisy planes and accommodations with the Kensington Noise Canceling Headphones. These comfortable and compact headphones let mobile professionals travel in peace and quiet. A built-in microprocessor analyzes background noises and creates an inverse sound wave that cancels the offending sound. Engines, fans, snoring, and other low frequency annoyances virtually disappear, leaving the traveler free to work, sleep, or listen to music in blissful silence.