Ultrasonic whistle for pet
Designed to establish a good contact for communication & discipline between masters & pets
Lets your pet be good enough to follow your every order
Widely used for dogs, can also be used for pet birds such as pigeons
Simply tighten or loosen the screw to make your pet to identify audio order easily
Inaudible to humans
Comes with a key ring for easy carrying
Material: nickel-plated brass