Relax your mind with a soothing, uninterrupted listening experience. Shut out up to 80% of the ambient noise around you with the MDR-NC60 noise-canceling headphones. These lightweight and comfortable noise-canceling headphones deliver tranquility no matter where you are. Great for work, traveling or just when you're trying to sleep in a loud place, they provide a calming atmosphere no matter where you are. The pressure-relieving cushion offers premium comfort, and the lightweight, folding design makes storing them a breeze.

Package Contents: 

MDR-NC40 Stereo Headphone

AAA Battery (Manganese)

Carrying Case

Inflight plug adapter

Battery box and cord

Limited warranty card

Frequency Range : 50- 1,500Hz (active noise attenuation)

Range of active noise attenuation: more than 14dB at 300 Hz