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 intelligently personalize the noise cancellation and sound performance to fit your ears, so you get proprietary active noise cancelling technology 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.