The 40" Dog Training Door Bell helps your dog communicate with you rather than barking or scratching on your doors and furniture. Hang this bell on your door handle or somewhere your dog or puppy can reach. Train your dog with treats to ring the bell with their paw or head. Teach them to let you know they need to outside by ringing the bells. Great for new puppy parents or professional dog trainers. This dog training tool is made with woven polyester and has 7 silver bells. Comes packaged inside a sealed hanging poly bag.