Every listen deserves the premium, personalised audio, world-class noise cancellation, and seamless experience of Bose QuietComfort Ultra Earbuds (2nd Gen). Feel all the feels with each song as CustomTune technology adapts the noise cancellation and audio performance to the shape of your ears. These wireless earbuds offer the best Bose in-ear noise cancellation for when all you want is the music. * Testing conducted by Bose with active noise cancelling on and audio playback at a loudness of 75dBSPL. Battery life varies based on settings and usage. ** Testing conducted by Bose by counting cycles of inserting battery-depleted earbuds into a fully charged case and charging to 100%, then resuming audio playback at a loudness of 75 dBSPL until battery depletion. *** Testing conducted by Bose by inserting earbuds with battery depleted into a fully charged case and charging earbuds for 20 minutes, then resuming audio playback at a loudness of 75dBSPL with active noise cancelling on and Immersive Audio off. Battery life varies based on settings and usage.