Dog Training-bark Control Device Dog Stop Bark Device Pet Gentle Trainer FYNVKeep Hostile Dogs Away- This product is mainly used for ultrasonic dog driving equipment in outdoor environment to avoid dog attack. This anti-bark device can be used anywhere: jogging or walking, cycling, in the park, in the car.Dog Good Behavior Training Tool- Based on the theory that ultrasound, the dog trainer can effectively train your dogs to be obedient and stop some unwanted behaviors like barking, digging, chewing and more.Pet Safe and Owner Friendly Design-- Lightweight and portable, our handheld dog bark control system stimulates dogs through sound that humans cant detect and wont hurt the auditory sensors of pets or other animals for safer daily training.Easy to operate-There are buttons on the Anti-Barking device that represent different functions. For more details, see the pi