Where is the product ID

Bought the Rox. Excited to see how the Dolby Plus can enhance my listening experience. I downloaded the Jabra Sound app. First thing it asks is the product ID. I searched high and low including every page in the manual and on the website. After an hour and tried just about every number combinations I see on the box. Nothing works! Can they make it less intuitive???

DMak-CA about Jabra Sound (ComplementaryApp)