Battery replacement, Replacement parts and accessories

Battery replacement

Although it varies by usage, battery life averages 35 hours. With the headphones turned on, the battery light indicator will ﬂash when there are approximately 5 hours of battery life remaining.

When a replacement is needed, use 1 AAA alkaline battery (IEC LR03). Tilt the top of the right earcup inward to gain access to the battery compartment.

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Note: You can use rechargeable batteries (NiMH, com- posed of nickel metal hydride, are recommended). They average half the life of alkaline batteries. However, the low battery indicator light is not set for such batteries and will not be a reliable indicator of their remaining battery life.

Replacement parts and accessories

You can order parts and accessories, as listed below, by contacting Bose® Customer Service. See the phone number for your area on the inside back cover of this guide.

•	Dual plug adapter	•	Deluxe carry case
•	Accessory kit	•	Replacement ear cushion kit
	(includes adapters,	•	1.5 m extension cord
	extension cord,	•	1.5 m extension cord
	extension cord,	•	6.2 m extension cord
	2 AAA batteries)	•	6.2 m extension cord
	2 AAA batteries)
		•	Audio attenuator

7	AM257565_00 _V.pdf May 13, 2003

QC-2 specifications

The Bose QuietComfort 2 (QC-2) headphones were introduced as a benchmark in the realm of noise-canceling audio technology. These headphones quickly became synonymous with comfortable listening experiences, deployed particularly by frequent travelers and urban commuters who sought a respite from environmental noise.

One of the standout features of the QC-2 is its advanced Active Noise Cancellation (ANC) technology. This system employs microphones both inside and outside the ear cups to detect and analyze ambient sounds, effectively producing opposing sound waves that cancel out unwanted noise. This acoustic innovation ensures that users can dive deep into their music or podcasts without the distractions of the outside world.

Additionally, the QC-2 headphones feature plush ear cushions that are designed for long-term wear, providing both comfort and passive noise isolation. The lightweight design further enhances the listening experience by allowing users to enjoy extended periods of use without discomfort. The headband is adjustable and crafted from soft materials, ensuring a snug yet gentle fit.

Another notable characteristic of the QC-2 is its audio performance. Bose has a longstanding reputation for delivering high-fidelity sound quality, and the QC-2 is no exception. Users experience deep bass, balanced mids, and crisp highs, enhancing the audio experience across genres. This is complemented by the headphones' ability to provide consistent sound quality regardless of ambient noise levels, guaranteeing an immersive experience whether in a quiet room or bustling subway.

Battery life is an area where the QC-2 shines. With an impressive playback time on a single charge, these headphones can keep up with the demands of long trips and busy schedules. Moreover, the simple controls allow for easy management of volume, play/pause functions, and calls, providing user-friendly accessibility that doesn’t distract from the listening experience.

Finally, versatility is a key feature of the QC-2. While designed primarily for personal audio enjoyment, they are compatible with various devices, including smartphones, tablets, and laptops, thanks to standard audio jacks and Bluetooth connectivity options. This adaptability ensures that users can seamlessly integrate the QC-2 into their daily lives, making it an ideal choice for anyone seeking high-quality audio combined with cutting-edge noise-canceling technology.