Description

The sound of this ultrasonic pet dog training whistle is adjustable, different dogs respond to different frequencies. You can adjust the frequency by simply turning the screw in or out until your dog shows the strongest response |

The ultra-long sound wave from the dog whistle can be heard by pets at a relatively long distance, but it is inaudible to human ears, it will not hurt your dog’s hearing, and it is harmless to our humans |

This is also a dog whistle tracker to prevent your dog from getting lost