Bose QuietComfort Earbuds II take Bose's class-leading noise cancellation and shrink it into true wireless earbuds. CustomTune calibrates ANC and sound to your ear canals every time you put them in, while the included Fit Kit of three eartip and three stability-band sizes finds the right seal. A USB-C case delivers up to 24 hours of total battery, with the buds themselves running 6 hours per charge.