This bark collar is divided into 3 levels and features a sound prompt on the first use, which is helpful for training your dog. It is a spray-style collar that is safe and effective. The collar is full-automatic and all you need to do is bring the dog barking control device home, turn it on, and put it on your dog's neck. It effectively eliminates annoying barking at night or when you're away, creating a peaceful environment for your family and neighbors. The NoMoreBark dog bark collar also has a safety-off function that temporarily once sound once spary anti-barking. Simply press any button to reactivate it.