Audio-Technica release date for NC Headphones "ATH-ANC9"

Mounted "Microphone Feedback" holding a noise-canceling effect on the housing inside,
 while mounted " Feed-forward Microphone " to reduce the external noise on
the housing outside Driven by a high precise active noise-cancellation circuitry,
reduce environmental noise up to 95%.

The "Airplane mode", "Office Mode" and "Study mode" mounted in, according to the situation to select an optimal noise canceling effect from the three tri-level canceling function. Mass is about 220g.

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