Bose QuietComfort Earbuds combine an astonishing listening experience with the world’s most effective in ear noise cancelling technology in one true wireless earbud. A patented acoustic port design and a premium, high-efficiency driver provide an immersive sound experience with deep lows. The result is stunningly lifelike reproduction of sound at any level. Bose QuietComfort Earbuds also reduce noise across the full range of human hearing. Microphones inside and outside the earphones sense noise and react instantaneously to cancel the signal. Eleven levels of noise cancelling allow you to eliminate distractions, minimize the noise cancelling or anything in between.