No whistle sound at all.  Defective item. Sent item back and no refund so far!
This was supposed to be a birthday gift.  The whole point of the gift was the whistle sound and this product did not make a whistle sound.  My husband and I both tried. It was obvious how it was supposed to work but it just did not produce a sound.  I liked the artistry but could not gift the defective item.  I sent the product back to seller which, being out of the country, was very expensive.  I have yet to receive a refund.  You may want to think twice before purchasing.  *I finally did receive a refund*
Rating: 1 stars