Product Description A+ Trainer is committed to studying behavioral psychology for companion dogs and exploring better ways of communication between humans and companion dogs. Taking advantage of our own technical research and development advantages, we have manufactured various pet dog accessories. A+ Trainer builds a bridge between owners and their companion dogs. Automatic dog bark collar provides a gentle and effective method of dog training, which has been well received by users around the world. Necklace with Stars Classic Necklace Cute Paws Necklace Classic Necklace-2 Dog Bone Necklace