Say goodbye to distraction with the MDR-ZX110NC Noise Cancelling Headphones. Featuring a 12–22,000 Hz frequency response for pristine bass, mids, and treble, these lightweight headphones reduce ambient noise by 95%, so all you'll hear is the music. Plus, you can listen for longer with 80 hours of battery life. The noise canceling function is effective in low frequency ranges and is not as effective for higher frequencies Cord Length: 3.94 ft; Frequency Response: 10–22,000 Hz.Frequency Response:10–22,000 Hz.