As the loyalest animal of the world, dogs spend all their lives and make contribution to human beings but never ask for a return, they protect us with all their love and bring us joy, companionship and a sense of pride. However, as the pet for human, sometimes they don't know how to tell what kind of the behavior is permitted and what is prohibited.<br> NVK Dog Training Collar sets up a bridge between owners and their pets, aiming at makes all the dogs are trained with respects and make them well obedient and get good behaviors.<br> NVK dog training collar is a professional humanized dog training tool it can help to correct dog barking, walking, leash training, sitting, aggression, and other bad behaviors.