Size: 13*2.5*5cm Package includes: dog repellent*1 (without batteries) 1. Principle of dog repellent: This ultrasonic dog repellent is mainly used in outdoor environments to prevent dogs from being attacked. When you meet a dog trying to attack you, you can pull out this "super weapon" ultrasonic dog repeller and emit ultrasonic waves to the dog. Ultrasonic waves of 130 dB are harmful to the dog. The stimulation is excellent for the auditory sense. The flickering of the super bright LED can also let the dog know the source and location of the sound, so the gun in your hand is aimed at him. The longer you stay in this position, the more damage it will do to him. so you will leave in a hurry. 2 How to use the ultrasonic dog repeller: (1) The ultrasonic dog repeller can be lighted: toggle the gear selection switch under the product to the "Light" position, press the "ON" switch button above the product, and it can be used as a flashlight. (2) How to train dogs with the repellent ultrasonic for dogs: switch the gear selection switch located under the product to the "Train" position, press the "ON" button on the top of the product, and the machine can emit ultrasonic waves. At this time, you can cure the dog training. (3) Ultrasonic Dog Repellent: Switch the gear selection switch under the product to the "Chaser" position, press the switch button " ON on the top of the product, use it on the vicious dog, and the vicious dog will run away. . 3. Precautions: When the machine is not in use, please set the speed selection switch to "Chaser" speed to avoid power consumption. The repellent effect of dogs is not significant in the following situations: (1) For a dog raised by itself, the dog knows that its owner will not harm it; (2) Dogs with their owners dogs are powerful, large trained dogs well behaved; (3) When the battery voltage is too low, the energy ultrasonic sound emitted from the product will decrease. (4) In dog repellent mode, due to strong output power and high power consumption, please do not press the switch for a while. long time, usually press it for 3-5 seconds, release the switch and press again. (5) The ultrasonic power emitted by this product is strong, please do not direct it to the ear human when you use it.