I was on the way to the duck blind one time and realized that I had forgotten my calls. My hunting buddy had his so it was no big deal, but as I was spazzing out over leaving my calls, he said you have three calls right there on your rear view mirror and he pointed to my Coaches whistles I had hanging up. He had me bring one when we loaded up for the blind and that morning with his coaching I called in Gadwall, Teal, Pintails, and some Green just using that Fox 40.