The 125 decibel ultrasound is very important for the dog’s auditory stimulation, the longer you stay in this position, the more damage it will cause, and he will quickly run away. Dog Attraction Principle: It is mainly used in outdoor environment to prevent dog attack. When the dog tries to attack you, you can take out the dog trainer and send ultrasonic waves to the dog. Light: On the button at the bottom of the gear selector switch to Light, the switch button at the top of the product is ON, which can be used as a flashlight. Dog training: On the gear selector at the bottom of the product, switch to the Training button, the product ON switch button at the top, the machine can emit ultrasonic waves, and the dog can be trained at this time.< /p> Prevention of attacks: Press the speed selector on the bottom of the product on the Chaser button, the ON switch button on the top of the product, and the dog will run away. The operation is simple: just approach the animal and press and hold