Bose QuietComfort Earbuds II are a sleek, versatile musical companion designed to fit you and everything you do. Engineered with pioneering CustomTune technology, these wireless earbuds personalise the noise cancellation and sound performance to fit your ears, so you get deep, immersive sound with powerful bass and the worlds best noise cancellation whether youre at home or on the go. To ensure all-day comfort and long-term stability, 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 for the best fit. With a compact, lightweight design, youll almost forget youre wearing them. Easily control your music or adjust your preferred level of noise cancellation with the earbuds simple touch controls. Phone calls sound crystal clear. Listen for up to 6 hours on a single charge, and the charging case holds three additional charges for a 24 hours total listening time. Advanced Bluetooth v5.3 capability. In-app EQ control. IPX4 rating for sweat and water resistance.