Sony MDR-NC500D Digital Noise Canceling Headphone (Black)

Product Description
The lightweight, MDR-NC500D headphones use digital technology to more accurately reduce stress-inducing noise from planes, trains and busses while providing the high-quality audio expected from Sony.
World's first digital noise canceling headphones
Artificial Intelligence noise canceling
Automatic selection between 3 different environments
Digital EQ - accurate sound & wide frequency response
Monitor switch to let surrounding sounds be heard