It is pronounced 100% correctly, I'm afraid :) Word and sentenced endings are pronounced very softly or muddled in Danish. The Danish pronoun"Han" is pronounced a lot like the first syllable in the English names "Hannah" and "Hannity". "Er" is pronounced a lot like the English "air", but leaning more towards the German word syllable "ehr", as in "Ehrlich". And "dreng" you could say "drei", and try to pronounce it like the German word for the number 3, and then add "ng" at the end, "drei-ng":
So it would be "han air en drei-ng", or "han ehr en drei-ng". But remember, the pronunciation is very soft compared to English and German.
Hope this helps!
The audio is perfect, at least in the fast version (I'm currently unable to hear the slow). Danes do speak fast. Sometimes two words are almost melted together, sometimes one word is barely pronounced. In this case a native might say "Han er'n dreng" in daily conversation. But don't bother about this, we will speak slowly if you ask. :)
Here are the words used in the sentence "Han er en dreng" clearly and individually separately by natives:
I hope that helps. :)