Ad details:
Shut off the outside world with MDR-NC6 noise canceling headphones. Ambient sound can be reduced over 10dB at 300Hz, which means you' ll hear more music, and less plane/train/bus noise. Noise canceling headphones are great for work, traveling, or even when you' re trying to sleep in a loud place. The MDR-NC6 have a slim swivel folding design, making them more compact for storage. Includes plug adapter to connect directly to a stereo or dual jack of in-flight music services.

Features
Reduces exterior noise by more than 70 percent (10 dB at 300 Hz) so you can hear music against a quieter background
Active noise reduction from 40 to 1,500 Hz using 1 AAA battery (not included); extended battery life approximately 30 hours
Compact size and folding design allows easy storage in a backpack, briefcase, or purse
Noise-canceling on/off switch; headphones work with or without power
Includes soft carrying case and airplane adapter plug.