Is it correct grammar to say Yours is the briefcase with phone ringing inside?

The sentence "Yours is the briefcase with phone ringing inside" is grammatically correct, but it sounds a bit awkward and could be improved. Here are a few suggestions:

More natural options:

* "The briefcase with the ringing phone inside is yours." This is a more direct and natural way to express the same idea.

* "Your briefcase has a phone ringing inside." This is a bit more concise.

* "The phone inside your briefcase is ringing." This is the most straightforward and clear option.

The original sentence is technically correct because it follows the subject-verb-object structure, but it sounds a bit strange because it places emphasis on the briefcase being "yours" rather than the phone ringing.