So I'm in a country where, when I browse flutes online, they have notes written next to the name of the flute in the syllabic form. So for instance you have a "Kaval flute" with "Si", "Sib", "Re", or "Mi" written next to it. These flutes are made of wood, have a thin-ish mouth piece and 6 or 7 holes, most of the ones I saw have 7. They are also blown into, not across (so more like a recorder flute).
I have zero knowledge of music and music theory and so I want to start with something basic but that will also allow me to play whatever I wish to learn.
My question is, when choosing a wooden flute, what does the note next to the name mean? Because I thought notes were more related to the pitch/high/low sound you produce when actually using the instrument, so why does the instrument itself also get a note? I also want to know which note to choose for the broadest range of potential, with a bias towards a deeper sound.
Any help would be appreciated.