Hey guys just wanted to give some tips out with mouth calls. For two years I have messed with mouth calls trying to learn how to use them effectively. I could get sounds just now turkey sounds haha. But this really helped me out. I bought the Primos pack that comes with the sonic dome call and two others and the instructional cd to teach you. That instructional cd put the pieces together for me! It helped me out soo much so just wanted to pass the info on to anyone struggling with the calls, buy that pack and the cd it will make everything so much easier. Good luck in the woods this spring and God Bless!