1. The principle of the dog repeller: This product ultrasonic dog repeller is mainly used in the outdoor environment to prevent being attacked by dogs. When encountering a dog that tries to attack you, you will take out this "super weapon" ultrasonic dog repeller, which will emit ultrasonic waves to the dog, and the 130dB ultrasonic wave will attack the dog. The auditory stimuli are great. The flickering of the super-bright LED can also make the dog clear the source and position of the sound, so as to understand that the weapon in your hand is aimed at it. 2 How to use the ultrasonic dog repeller: (1) The ultrasonic dog repeller can be illuminated: toggle the gear selector switch below the product to the "Light" gear, press the button switch "ON" above the product, and it can be used as a flashlight. (2) How to train the dog with the ultrasonic dog repeller: Toggle the gear selector switch below the product to the Train gear, and press the button switch ON above the product to send out ultrasonic waves. At this time, you can train the dog. train. (3) Ultrasonic dog repelling device: Toggle the gear selector switch at the bottom of the product to the "Chaser" gear, press the button switch "ON" on the top of the product, use it against the evil dog, and the evil dog will run away. 3. Notes: When the machine is not in use, please set the gear selector switch to "Chaser" to avoid power consumption. The effect of repelling dogs is not significant in the following cases: (1) own dog, the dog knows that the owner will not hurt it; (2) The dog with the owner - the dog fights the human situation; the trained large dog - well-trained; (3) When the battery voltage is too low, the ultrasonic energy emitted by the product will decrease. (4) In the dog drive mode, due to the strong output power and high power consumption, please do not hold down the switch for a long time, generally press it for 3-5 seconds, release the switch and then press it again. (5) This product emits strong ultrasonic power, please do not use it against human ears.