Mouth call and box call. Because of my narrow palate, I have to use a mouth call youth frame for the hen calls. But for gobbler yelps I can use a triple reed regular frame and get 2-3 decent yelps. Not much volume, but it works. With a box call, I can get a deeper and louder yelp at the beginning of the paddle stroke. Takes some practice, but lighter pressure on the paddle produces the right sound.