How to pair replacement earbud
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Place both earbuds in the charging case, do NOT close the lid of the charging case. Now, hold the initialize button on the back of the charging case for about 15 seconds or more. Release your finger within 5 seconds after the indicator (orange) on the charging case starts flashing. Pairing is now complete.
Initialization instructions:
helpguide.sony.net/mdr/2963/v1/en/contents/TP1000783925.html
Initialization video:
youtube.com/watch?v=Bh5O3yJ8vWk