Overview: The Bose QuietComfort 20i Acoustic Noise Cancelling
headphones combines the audio performance of the Bose IE2 in-ear headphones with
the patented Acoustic Noise Cancelling technology. The QC20i comes with an
in-line remote/microphone that is compatible with Apple i-devices, including iPhone 3GS and later, iPod touch (2nd generation and later), iPod nano (4th generation and later), iPad, iPad 2, MacBook, and MacBook Pro models 2009 and later.
Acoustic Noise Cancelling Headphone Technology: The patented
Acoustic Noise Cancelling headphone technology in Bose QuietComfort headphones
provides full-spectrum noise reduction for a better audio experience.
Microphones on the outside of the earbuds actively monitor what you hear,
including unwanted outside sound. The difference between the unwanted sound and
the desired sound is then electronically processed, creating a correction signal
that acts to negate the unwanted noise. The speaker within each ear-cup is then
fed the correction signal. This signal, combined with the passive noise
reduction of the StayHear+ ear tips, dramatically reduces the outside
distractions that reach your ears.
TriPort Technology: Bose proprietary TriPort technology allows the
drivers of the QC20i headphones to create deep lows while keeping the headphones
small and lightweight. TriPort technology, combined with Active EQ, give you
lifelike sound for your music, videos, and phone calls.
StayHear+ Ear Tips: The Bose headphones come with StayHear+ silicone
ear tips in three sizes (Small/Medium/Large) to help assure a more accurate and
comfortable fit. The StayHear+ ear tips offer greater in-ear stability during
exercise and other active sports. Advanced materials and design allow the tips
to nestle inside the bowl of the ear, while also naturally conforming to the
ear's upper ridge. The natural oblong cone shape of the ear tips provides a
gentle seal that helps keep unwanted ambient noise out. StayHear+ ear tips also
are designed to remain more securely on the headphone itself.
Aware Mode: The Aware Mode temporarily turns off the Active Noise
Cancelling to allow you to hear ambient noise while continuing to listen to your
music. Whether you're crossing the street, waiting on airline gate
announcements, or just wanting to be more aware of your surroundings, you can
engage the Aware Mode by pushing a button on the in-line remote.
In-line Remote/Control Module: The QC20i gives you control over your
headphones and your music. The 4-button in-line remote/microphone is compatible
with Apple i-devices, and features volume up/down, answer/end call, voice
commands, music/video functions, and Aware Mode. The microphone enables you to
make phone calls and perform voice commands with your iPhone. The control module
contains the rechargeable battery, and includes the power switch for Active
Noise Cancelling and LED status indicators.
Rechargeable Battery: The QC20i's Active Noise Cancelling is powered
by a rechargeable Lithium-Ion battery in the Control Module. The battery is
charged with the supplied USB cable in approximately 2 hours. A fully-charged battery provides approximately 16 hours of battery life. Even if the battery is
exhausted, you can still use the headphones without Active Noise Cancelling.
Clothing Clip: The included clothing clip help keep the
headphones in place when you're on the move. Use the clothing clip to fasten the
cable to your clothing, for convenience, stability, and to help manage the
cable. This can be helpful during rigorous activities or when using the
headphones in a single earpiece configuration.
Storage Case: The headphones come with a small carrying case
that protects your headphones and cables when not in use. The case has a small
mesh inside pocket for small items, and a zippered closure.