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You can't use with out left ear bud
Sorry, there was a problem. Please try again later.Hi Christian, No, you'll need both devices. The left and right WF-1000X headphone units and the charging case require connection settings that can only be set at the authorized service center. Kindly refer to this link for more information: https://www.sony.com/electronics/support/wireless-headphones-bluetooth-headphones/wf-1000x/articles/00189241 ~Ralph
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