Sony Store offers its Sony Digital Noise Canceling Headphones, model no. MDR-NC500D, for $199.99 with free shipping. That’s the lowest total price we could find by $50. Sales tax is added where applicable. These headphones feature 20 dB of noise cancellation, 5Hz to 24kHz frequency response, and a built-in lithium ion battery. Two AA batteries (included) can also be used to increase play time.
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