Sony MDR-NC40 Noise Canceling Headphones w/ Travel Case

Product Description
Sony MDR-NC40 Noise Canceling Headphones w/ Travel CaseRelax your mind with a soothing, uninterrupted listening experience. These lightweight and comfortable noise canceling headphones deliver tranquility no matter where you are.
Design: Soft and comfortable on-ear fit with pressure-relieving urethane ear cushions.
Noise reduction: Reduces noise up to 90% (10 dB at 300 Hz) when noise canceling circuit is switched on
Passive function: The headphones can operate as passive headphones when the noise canceling circuit is not activated.
Ideal for: Loud, noisy environments planes, trains, buses, work or dorms.
Plug adapter: A supplied plug adapter connects directly to stereo or dual jack of in-flight music services