ultrasonic dog repeller Generates very powerful ultrasonic waves. When a dog hears the sound of ultrasound, it will feel uncomfortable and stay away from humans. People can't hear. dog behavior training It can safely and effectively stimulate the dog's nervous system so that it can accept the owner's guidance. It has an infrared light that allows the dog to follow and effectively trains the dog to stop bad behaviors, such as barking, digging, eating and other dangerous behaviors. , fighting, etc. Portable Equipped with a power cord, it is convenient to take it anywhere you need, such as jogging or walking, cycling, park, etc. Easy to use Open the battery cover first, then insert a 9V battery (not included), turn on the switch to work normally. It can also be used as a flashlight when needed. Warn The ultrasonic anti-barking device is not effective for dogs with hearing problems, we do not recommend this product for dogs under 6 months old because it may disrupt the dog's hearing