The "Sound Plate" automatically positions the call in your mouth at the right place and angle, making calling elk easier. The 30 degree angle of the Sound Plate, the double-reed design, and the "V" cut in the bottom reed make the Imperial Plate Double perfect for reproducing cow and herd bull sounds. The "V" cut also adds to the raspy sounds of the herd bull's growl, bugle, and chuckle.