Application range:1-5m; Material: ABS plastic; Charging: type-C; Battery: 3.7V/500mAh litium battery; Working principle: The human hearing range is 20-20000hz, while the dog hearing range is 15- 50000hz. The ultrasonic dog driving device uses 25000hz, which can not be heard by human ears, to produce an instant strong "explosion" sound to stimulate the hearing of dogs, so that dogs feel afraid, thus playing the role of driving dogs. The sound of 25000hz can not be heard by human ears and will not cause trouble and stimulation to people. Dogs can hear and stimulate dogs effectively, but ultrasound will not cause any harm to dogs. Both modes apply to all dogs High frequency ultrasonic driving is suitable for driving wild animals such as wild dogs and cats outdoors, Stray cats and dogs are very sensitive to 25000hz frequency, You can also turn on the flash lamp mode at night to increase the success rate of driving.