Bose QuietComfort Earbuds II are engineered with pioneering CustomTune sound calibration technology that personalizes the audio to your ears, so you can enjoy world-leading noise cancellation and deep, immersive sound wherever you're listening to music.Engineered with pioneering Bose CustomTune technology, QC Earbuds II personalize the audio to fit your ears. When noise cancellation and sound performance are tailored to you, your music is more engaging, allowing you to feel a deeper connection to whatever you're listening to.Bose QuietComfort Earbuds II are a sleek, versatile musical companion designed to fit you and everything you do. Engineered with pioneering CustomTune sound calibration technology, these wireless earbuds personalize the noise cancellation and sound performance to fit your ears, so you get the world's best noise cancellation and deep, immersive sound with powerful bass whether you're at home or on the go.To ensure all-day comfort and a secure fit, the earbuds come with the Bose Fit Kit that includes 3 different soft, silicone ear tips and 3 different stability bands to mix and match to find your best fit. With a compact, lightweight design, you will almost forget you're wearing them. Easily control your music or adjust your preferred level of noise cancellation with the earbud's simple touch controls. Phone calls sound crystal clear. Listen for up to 6 hours on a single charge. The charging case holds 3 additional 6-hour charges for a total of up to 24 hours of listening time. IPX4 rating for sweat and water resistance. Advanced Bluetooth 5.3 capability. In-app EQ control.Legendary Sound. Personalized To You.Your music sounds best when the listening experience is tailored to you. That's why Bose QuietComfort Earbuds II are engineered with pioneering CustomTune sound calibration technology that optimizes the noise cancellation and sound performance to fit your ears. With personalized audio, you can enjoy the world's best noise cancellation and deep, immersive sound with powerful bass wherever you're listening to music.The best noise cancellation of any earbudQC Earbuds II represent a revolutionary advance in noise cancellation technology with the ability to cancel noise better than any noise-cancelling earbuds or over-ear headphones on the market. It starts with ensuring an optimal fit to your ears. The soft, silicone ear tips have an umbrella shape that creates a firm seal at the opening of your ear, reducing outside noises. Microphones then detect environmental noise and generate an opposing signal to cancel it, making your quiet sound quieter. CustomTune technology personalizes the noise cancellation to the shape of your ears to precisely soften sounds that are hardest to reduce, like voices.You and your music in perfect syncQuietComfort Earbuds II deliver lifelike, balanced sound with nuance, clarity, and depth, so you can get in the zone and feel seamlessly connected to your music. The wireless earbuds are engineered with high-performance drivers, amplifiers, and electronics that are custom-designed to fit a small package. CustomTune technology takes the sound to the next level by personalizing it to your ears, so your music sounds even more immersive and emotionally impactful.Find your best fit with the Bose Fit KitTo ensure your wireless earbuds feel comfortable and stay put no matter what you're doing, QC Earbuds II come with a Bose Fit Kit. The convenient Fit Kit includes three pairs of ear tips and three pairs of stability bands designed to fit the unique shape of your ears. Both the ear tips and stability bands are made from soft silicone for all-day comfort and a secure fit. The ear tips rest gently but securely in your ears and spread contact evenly. The stability bands hug the contours of your ears with curved fins that grip your ears for a snug fit. And since no two ears are the same, even on the same person, swap different-sized ear tips and bands to find your best fit.You're in control of your soundWith Bose QC Earbuds II, you decide how much of the world you want to hear. Quiet Mode offers maximum noise cancellation, so you can feel fully immersed in your music. Want to listen to music but still hear what's going on around you? Aware Mode offers full transparency to hear your surroundings with striking clarity. This mode automatically applies ActiveSense technology to soften the loudest sounds, like a passing bus, to a more pleasant and balanced volume. Use the Bose Music app to disable ActiveSense or create custom noise cancellation modes.Crystal-clear, natural-sounding phone callsUse Bose QC Earbuds II to enjoy clear and natural-sounding phone conversations. Two noise-rejecting microphones in each earbud focus on the sound of your voice and filter out ambient noise and wind. Digital signal processing technology further enhances the signal to ensure your conversation is clear. Calls play through both earbuds, or you can use either bud by itself. If auto-answer is on, and you've removed your earbuds, just place them in your ear to answer.Control your music with the simple touch interfaceUse the simple touch interface on the wireless earbuds to control everything. This convenient interface frees your hands so you can stay focused on whatever you're doing. With simple swipes and taps, play or pause music, change the volume, and switch tracks. You can even answer calls and change the noise cancellation level, all without ever touching your phone.They know when they're in - and pause when they're outNeed to pause your music to have a conversation? QC Earbuds II have sensors that know when they've been inserted or taken out. Remove an earbud and your music will automatically pause. No need to mess with your phone. Put the bud back in your ear to pick up where you left off.Up to 6 hours of battery life. Even longer with charging case.Stay absorbed in the music you love for up to 6 hours. When not in use, store your Bose QuietComfort Earbuds II in the portable charging case - it's small enough to fit in your pocket. If the battery gets low, voice prompts let you know. Out of power and don't have enough time to fully charge? The quick-charge option provides up to 2 hours of battery life from a 20-minute charge. The case is magnetized to hold the buds in place, charges via USB-C, and holds 3 additional 6-hour charges for a total of up to 24 hours of listening time.Sweat & weather-resistant earbuds (IPX4)Bose QC Earbuds II are a versatile musical companion that can go wherever you go. With an IPX4 environmental rating for sweat and water resistance, they can handle drips, sprays, and water splashes - and they're built to withstand sweat. The acoustic mesh keeps out moisture and debris, so even if you get caught in the rain, the earbuds will keep working.Control everything through the Bose Music appThe Bose Music app guides you through setup. Use the app to access your preferences, including noise cancellation levels, Bluetooth connections, shortcuts, and more. You can check the battery, customize your shortcut, and even adjust the sound profile of your music to your liking. Use Adjustable EQ to control the bass, mid-range, and treble levels to suit your tastes. Software upgrades and new features are also available through the app.Additional Features• Pioneering CustomTune technology personalizes the noise cancellation and sound to fit your ears, so you can enjoy world-leading noise cancellation and uninterrupted, immersive listening• A revolutionary advance in noise cancellation technology, QC Earbuds II block noise better than any wireless earbuds or over-ear noise cancelling headphones on the market• QC Earbuds II deliver lifelike, balanced sound with nuance, clarity, and depth, so you can get in the zone and feel seamlessly connected to your music• The Bose Fit Kit gives you 3 different soft, silicone ear tips and 3 different stability bands to mix and match, so you can find your best fit. The ear tips and stability bands are made of rubbery silicone, not slippery plastic, and their soft texture adds grip and stability• Innovative acoustic technologies were custom-built to fit a small package, so you can put in your earbuds and almost forget about them while you work, play, and do everything in between• Simple touch controls on both earbuds provide easy control of audio playback, noise cancellation modes, and call functions, freeing your hands to focus on what you're doing• Quiet Mode provides maximum noise cancellation to feel immersed in your music, while Aware Mode offers transparency to hear the music and your surroundings• Bose ActiveSense technology enhances Aware Mode by softening the loudest outside noises around you to a more pleasant and balanced volume• Adjustable EQ settings in the app let you adjust the sound profile of your music - bass, mid-range, and treble levels - to your liking• Two noise-rejecting mics in each earbud and digital signal processing focus on your voice and filter out ambient noise and wind for clear and natural-sounding phone conversations• Sensors recognize when an earbud is removed, pausing the audio for a quick conversation, while the other earbud switches to Aware Mode• Listen for up to 6 hours on a single charge and get 3 additional full charges from the included case for a total of up to 24 hours of listening time. The case charges via USB-C• With an IPX4 environmental rating for sweat and water resistance, QC Earbuds II can handle drips, sprays, and water splashes - and they're built to withstand sweat