Your audio, uninterrupted. Featuring Sony's groundbreaking digital noise canceling technology, the MDR-NC300D earbud style headphones produce incredible noise reduction and pristine quality audio. Plus, exclusive digital signal processing technology reduces up to 98.4% of ambient noise (at 160Hz) from airplanes, trains, or at the office. Enjoy studio-quality sound from the 16mm driver units, while a convenient monitor switch allows you to minimize your audio and listen to conversation. Depending on your listening needs, you can choose from Movie, Bass or Normal modes. Additional features include a gold-plated, L type stereo mini plug, carrying case, in-flight plug adapter, cord adjuster and seven ear cushion sizes. Estimated ship date: 03/16/2010 Features:

• Noise canceling technology Noise canceling headphones reduce ambient noise and provide a quieter environment to enhance audio entertainment. The headphones have an inside microphone on each earpiece that works with electronic circuitry and ambient sound is reduced by synthesizing with a sound in opposite phase produced by the noise canceling circuit.
• 16mm Driver Units Drivers work with digital sound enhancer to deliver wider frequency response and superb sound quality.
• Selectable Sound Mode Select Movie, Bass, or Normal listening mode based on your listening needs.
• Highest Quality Noise Canceling Reduces up to 98.4% ambient noise (20 dB at 160 Hz) when noise canceling circuit is activated.
• Convenient Operation Easy-to-reach volume and built-in monitor function on the controller allows you to hear surrounding sound without taking off the headphones for flight announcements or conversation.
• Battery Uses single AA battery for up to 16 hours of listening time.
• Artificial Intelligence Automatically selects the optimal noise canceling mode based on intelligent analysis of environmental ambient noise.
• Ergonomic Design Vertical in-ear style housing and seven ear pad sizes for secure, personalized fit.

What's in the box:

• Carrying case
• Cord adjuster
• In-flight plug adapter
• AA battery x 1
• 7 size earbuds
• Warranty card
  
  Source:
  www.sonystyle.com