Oh, my god.With such a good training collar, I have a large labrador, gentle but sometimes unstable.Always up to something, very naughty.Owners of large pets in the home should know that it is not safe to have a dog without strict training and discipline, which is not only responsible for their own pet, but also responsible for the safety of others.There are many modes in this circle, including vibration mode, tonal mode, etc.You can use these patterns to effectively control your dog's behavior when the dog is behaving badly, and I think it's great to use them.I saved a lot of heart.