Function Description.An ultrasonic trainer that emits ultrasonic waves by pressing the transmit button to correct uncivilized behavior in dogs. The ultrasonic wave emitted by the ultrasonic wave trainer will stimulate the dog and make the dog feel surprised, thus interrupting the barking and preventing the subsequent uncivilized behavior. Continued use for a period of time, the dog will gradually improve the uncivilized behavior and develop good habits of civilized travel.Product selling points.1. for the dog will adapt to the ultrasound frequency problem, increased the ultrasonic frequency conversion gear2 ultrasound powerful, sound waves lead to airflow enough to blow out the lighter flame3. single function, stable and reliable products, in favor of reducing bad reviews4. charging models, long standby time5. Shell surface oil spraying + night back to light