The Roy Gonia® Dog Whistle from SportDOG Brand® is hand-crafted and has been used to train more Field Champions than any other whistle. The whistle features a lower-pitched sound that carries farther and an easy-to-blow design for effective communication while training or in the field. The Roy Gonia is a great all-around dog whistle that's used by both pros and amateurs across the world for all breeds of hunting and working dogs.