Protect yourself against aggressive dogs!The Ultrasonic generates an interval frequency of 23 to 27 kHz. Due to the changing frequency, the animals cannot get used to it and older animals with which the hearing has already decreased can also hear it. For some people the handling of dogs is a nerve-racking situation, which can become a problem especially in free-running dogs. To avoid these situations is very simple and efficient with the ultrasonic dog repeller. The dog repeller emits ultrasonic waves that are not audible to humans at the push of a button. These are very disturbing for the dog, especially in a short distance (2 to 5 m) and cause the animal to move away. Don't worry, the deterrent doesn't trigger any kind of aggression in the dogs and doesn't hurt them either.Ideal for joggers, walkers, cyclists, walkers, postmen, etc. who want to protect themselves against the attack from dogs.The device also optimally agrees as an animal trainer.If the dog does something good, will he