Primos Hyper Plate Reed Elk Call - The "Sound Plate" automatically positions the call in your mouth at the right place and angle, making calling elk easier. The Hyper Plate Double has a 30 degree Sound Plate, double-reed design, and a "Y" cut in the bottom reed. It reproduces Estrus cow and raspy herd bull sounds without having to switch calls. Angle of the sound plate is set at 30 degrees Large "Y" cut in bottom reed produces Estrus cow and raspy herd bull sounds, all without having to switch calls