This dog obedience training whistle is an tool for gaining your pet's cooperation through positive reinforcements.By producing an odd, interesting sound you gain your dog's attention and get him to do something positive, rather than attempting to break a bad habit through harsh means.Using a dog whistle is the safe, humane alternative to collars, and can be used to distract or repel aggressive strays. Features - Color : PIC.1. - Material: Copper and pc. - Dog whistle train with strap and clicker. - You can adjust the frequency rod of your whistle to find the pitch that your dog best responds to. - This dog obedience training whistle is an tool for gaining your pet's cooperation through positive reinforcements. - By producing an odd, interesting sound you gain your dog's attention and get him to do something positive, rather than attempting to break a bad habit through harsh means. - With our dog obedience training whistle you will deliver consistent commands, in a high frequency range that is inaudible to human ears. Your neighbors will be most appreciative - Using a dog whistle is the safe, humane alternative to collars, and can be used to distract or repel aggressive strays.