It's a scream
It's super loud. Truly does sound like a bloody-murder scream. Looks exactly like what you would expect from something called an "Aztec Death Whistle". And the look is perfect for any creepy/horror costume. Quintessential for your Halloween fun or for a good natured scare prank.  Downsides- bulky, doesn't appear to be very durable and it's size does not make it easy to conceal. Despite that I'd recommend this if you're looking to stir up a little mischief.
Rating: 5 stars