Sony Electronics Inc. • 16530 Via Esprillo • San Diego, CA 92127 • 1.800.222.7669 • www.sony.com
MDR-NC40
Noise Canceling Headphone
1. Frequency range of active noise attenuation is 40 – 1,500 Hz, more than 10 dB at 300 Hz.
2. Using 1 Alkaline LR03/AM-4(N) (size AAA) battery. Actual time may vary based on product settings, usage patterns, battery and environmental
conditions. Time stated may vary based on temperature or conditions of use.
3. May not be compatible with some in-flight audio/video services.
©2009 Sony Electronics Inc.
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Features and specifications are subject to change without notice. Non-metric weights and measures are approximate.
Last Updated: 08/11/2009
Active noise canceling technology automatically reduces low
frequency ambient noise by 90% .
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Lightweight design (2.82 oz with battery installed) and urethane ear
cushions provide a comfortable fit even after extended use.
Foldable headphones and compact carrying case reduces the
overall size of the headphones when not in use for greater portability
and storability.
Built-in monitor function lets you silence the audio playback so you
can listen to the surrounding environment.
Enjoy up to 40 hours of noise cancellation from a single alkaline (size
AAA) battery (included).
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