This call is a very unique call that I have yet to see from any other company at this time. It makes an estrous chirp that the maker describes very well as a 40lb canary. There is a good demonstration of how to use this call on the Predatorsniper.com website or listed under predator sniper on u-tube. This call took me a little practice to get the sound that I wanted consistently, but once I got it down it was easy to master. This is a very quick chirp that is blown from deep in your chest, not from your cheeks.