Are ultrasonic dog repellents harmful to dogs?

The principle of the ultrasonic wormer is to use the inaudible sound Hz to send out an instantaneous strong “explosive” sound to stimulate the dog’s hearing and nervous system, making the dog feel scared and thus playing the role of dog repellent. It has no effect on the dog for a short period of time or if the dog runs away. However, prolonged exposure to such conditions can lead to neurological effects on the dog. In the CCTV report, the staff did a special test experiment on ultrasonic dog repellents and did experiments on different dogs. The experimental results showed that the dog repeller can serve the purpose of repelling dogs away from you, whether it is for pet dogs or stray dogs.