Knight & Hale Shock-Gobble Owl Call with Hoot Enhancer Chamber The addition of the Knight & Hale hoot enhancer means you don't have to Use your hands to make that perfect Owl call Hoot enhancer creates back pressure so its easy to get the tone just right Wood impregnated plastic (wip) technology adds to this game calls utility by lending it the sound of wood while featuring the durability of plastic