It's a fun keyboard in a sort of strange way, but yes, rubber dome.
Works as a 100% normal Model M on a computer. No phone electronics inside, just a pass-through to the receiver jack on the left.
Seller is recommended for a quick, pleasant transaction for her part. Did her best to keep shipping costs low.
Worth noting: the box they come in can be reused for any Model M including M13s (there's a cut out for the trackpoint). Good storage/transportation box, easily worth 5 bucks on its own. Even has adequate storage space for a cable at the end when closed.