BOSE QuietComfort20 QC20 When noise cancellation is ON: A buzzing sound comes from the left and right earbuds. It's not very noticeable when music is playing, but it's noticeable when music is off. When noise cancellation is OFF, there is no noise and music can be played. Due to battery degradation, this item is considered junk. Returns and refunds are not accepted. Included items: Earphone body only