What can you do when your dog starts barking nonstop? With the ultrasonic trainer you can train your pet to be obedient, correct bad behavior and stop barking. The trainer is based on the theory that ultrasonic (over 20KHZ) is above the upper limit of human hearing and super ultrasonic white light and 2800mcd strong. It can activate the visual and additive activation of dogs, cats and other animals, but there will be no effect on people. Features: A must have for pet owners, perfect for training all kinds of dogs. Trains pets to obey, correct misbehavior and stop barking. Simple flip the switch and efficient use. It’s super ultrasonic white light and 2800mcd strong. Evict ferocious dogs effectively and protect you from vicious dog attacks. Since ultrasound is above the upper limit of human hearing, there is no effect on people. No harm to humans and pets can be used as a torch at the usual time. With strap easy to carry, portable, convenient and easy to use. Features: Main material: