PetSafe's pet training tool "Clicker Clik-R" with finger band. Although unopened, the blister case has a protrusion, exceeding 3cm in thickness, so that part has been cut off due to shipping costs. Please check the photos. When your dog performs a desired action such as "sit," "down," or "spin," the clicker is clicked, and a treat (reward) is given quickly. By repeating this, the dog understands the connection between the clicker sound and being praised and receiving a treat, and will be more likely to perform the actions the owner desires.