serial number for Elite 200 V2

How do i find the serial number of my elite 200 v2? I can’t get on the app without it. Thanks for any help with this, calling bluetti has not worked.

The serial number is the QR code on the back of the unit.

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It’s listed on the bottom of that QR code.

The other way to find the serial # is to connect to the App, it is shown once you connect to that particular unit as its name,