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Engineered to create a comfortable listening environment in areas with high ambient noise, the Audio-Technica ATH-ANC3 in-ear headphones feature a miniature microphone in each earpiece that picks up ambient noise (such as traffic, air-handling systems, etc.). Electronics in the control box create a noise-canceling wave that is 180 degrees out of phase with the ambient noise. This wave acts like a noise eraser: it cancels out the annoying sounds that surround you without diminishing the audio you want to hear. Features Ultra-compact in-ear design is ideal for travel Advanced electronics cancel up to 85 percent (20 dB) of background noise Innovative ANC circuitry for an exceptionally pure audio signal in noise-canceling mode Compatible with all audio sources, including MP3 and other portable players Soft interchangeable ear pieces for a custom fit Monitor switch to deactivate noise cancellation/audi 0 Audio functions (in passive mode) even without battery Sleek control box with on/off and monitor switches and clothing clip Two-pin airline adapter for in-flight entertainment Hard carrying case to protect headphones and accessories Specifications Type: Active noise canceling Frequency response: 15Hz-22kHz Magnet: Neodymium Driver diamter: 12.5 mm Sensitivity: 104 dB Impedance: 90 Ohms Active noise reduction Up to 20 dB Connector: Gold-plated 1/8 in./3.5 mm stereo mini-plug Battery: AAA (alkaline) Cable length: 3.3 ft./1.0 m Weight (without cable and battery): 7.1 oz./200.0 g In the box Audio-Technica ATH-ANC3 headphones Extension cable (1.5 ft./0.5 m) Airline adapter AAA battery Carrying case Three ear pieces (rubber tips), sizes S/M/L Warranty One-year limited (For details, visit www.audio-technica . com/cms/site/9b1d a7946d7de4bf/inde x.html.) Mfr. Part No.: ATH-ANC3BK Note: Products sold through this website that do not bear the Apple Brand name are serviced and supported exclusively by their manufacturers in accordance with terms and conditions packaged with the products. Apple's Limited Warranty does not apply to products that are not Apple-branded, even if packaged or sold with Apple products. Please contact the manufacturer directly for technical support and customer service.