If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ear
INTRODUCING QUIETCOMFORT EARBUDS II: These new wireless, bluetooth, noise cancelling earbuds from Bose weren’t designed with a one-size-fits-all approach. These next-generation wireless earbuds are engineered to fit you. They intelligently personalize the noise cancellation and sound performance to uninterrupted, immersive listening wherever you are. To ensure all-day comfort and a secure fit, they come with three pairs of ear tips and three pairs of custom stability bands, so you can find the best fit for your ears. Own your uniqueness with sound and fit shaped to you.