Buying a Surface Pro 9 - How to Confirm Expected Specs Without Initial Windows Setup?

Hey all, I'm buying a used surface pro 9 off of someone tomorrow. I don't have any reason to distrust them. However, it would be nice to double check the specs.

I'm expecting it will be formatted and device manager/windows won't be available right away to look without some setup. Is there a way I can check the specs by serial number, or know the version of surface based on physical characteristics?

It's a pro 9, 256gb 16mb i7, and I would like to make sure the seller is correct about what they are selling before I walk away.