1. The principle of driving dogs: This product is mainly used to be attacked by dogs outdoors. When you meet a dog trying to attack you, you will take out this "weapon" and launch ultrasonic waves to keep the dog away. The 130dB double head ultrasonic wave is very great for the dog's hearing. Yes, the strip infrared laser improves the repelling effect of the dog at longer distances. The flashing 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 pointing at him. 2. How to use: (1) Lighting: Switch the gear selector under the product to "Light" gear, then it can be used as a flashlight. (2) Dog training: Turn the gear selector on the bottom of the product to "I" gear and press the "ON" button above the product to send out ultrasonic waves. At this time, you can train the dog. (3) Dog driving: Switch the gear selector at the bottom of the product to II, press the button ON at the top of the product, and the ultrasonic + infrared laser can be emitted. Use it on the wrong dog, and the wrong dog will run away. 3. Notes: When the machine is not in use, please set the speed selector to "". The effect of repelling dogs is not significant in the following cases: (1) own dog, the dog knows that the owner will not harm him; (2) The dog with the owner - the dog competes with people; after training large dogs - well behaved (3) When the battery voltage is too low, the ultrasonic energy emitted from the product will decrease. (4) In dog mode, due to strong output power and high power consumption, do not hold down the switch for a long time, usually press it for 3-5 seconds, release the switch, then press it again. (5) This product emits strong ultrasonic power, please do not use it against human ears.