The Bose QuietComfort Earbuds II deliver the world's best noise cancellation in a truly wireless earbud, using dual microphones and an ear-tip sensor to create a custom acoustic pocket that blocks more noise than any competitor. CustomTune technology personalises both ANC and equalisation to your exact ear shape within seconds of wearing them. With up to six hours of battery per charge (18 hours with the case) and an IPX4 sweat-resistant rating, they're built for all-day wear and active use. Conscious Mode allows instant awareness of your surroundings without removing the earbuds.