The echo poly open water call is great when hunting large open water areas. The open water call is designed for longer distance calling. It has a loud raspy quack, and a Real nasty hen sound that Ducks really Flock to. Echo polycarbonate Duck calls will fit your style of hunting. The polycarbonates are very easy to blow, and produce a sound that is irresistible to Ducks. Mpn:77725.