WIRED HEADPHONES OPTION: Plug the included audio cable with in-line microphone into your Bose noise cancelling headphones to use them without a Bluetooth connection, or even when the battery is depleted.
I liked the sound quality. Bought them for the noise cancelling: they are installing new water pipes in the building and I could not stand the noise any longer. The Bose Quietcomfort saved me! They worked perfectly well.