Product Description A + Trainer is committed; & agrave; Study behavioral psychology for companion dogs and explore better ways of communication between humans and companion dogs. Taking advantage of our own advantages in research and development in the field of techniques, we made; various accessories for companion dogs. A + Trainer establishes a bridge between masters and their companion dogs. Automatic Dog Bark Collar provides a gentle and effective method of dog training, which has been shown to be effective. well received by users all over the world. Star Collar Classic Collar Pretty Paws Collar Classic Collar-2 Dog Bone Collar < / p>