This flute is a combination of the traditional Native American flute and the classical european recorder flute (blockflöjt).
The result is flute with stronger, more progressive or ringing sound that the native flute but- due to the simpler scale- much easier to manage that the recorder (blockflöjt).
One clear advantage if this construction over the Native American flute is that even if in the same key/tuning, you will always get a shorter with smaller holes and closer together.