The Roy GoniaA(R) Special Dog Whistle from SportDOG BrandA(R) 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 Special 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.Features:Easy-to-blow designLower pitch, pea "trill" sound carries fartherUsed to train more field champions than any other whistle