Using the Triple Crown Clicker is an easy and fun way to shape and reward positive behaviors in your dog. It is based on the scientific principles of classical conditioning and operant conditioning, and its ergonomic design makes it comfortable to use. Developed by the training directors from the World Leader in Pet Education and our international school for professional dog trainers, the StarMark Clicker utilizes scientifically proven animal behavior principles for fast, fun learning. Comes with a free training guide and access to free online video lessons.