Effective Potty Training - Teach your pet to ring a bell to go out or use the toilet, instead of scratching at the door and barking for your attention, the top button is flat and wide which is easy for a dog or cat to lean on, a set of two bells can be placed on the outside or inside of the door. Non-Slip Rubber Bottom - There are 3 rubber feet under the bottom that help keep the bell in place. It will not be easy to slide on the floor, and also can protect the floor to prevent scratching. For Small Dogs and Cats --- This 7.2cm (2.84 inch) diameter palm sized pet trainer is made of stainless steel, ABS plastic and features an elegant paw print. Clear Ring --- Since it is not hanging on the door, the animal can press the bell with the paws to increase the sound and avoid missing sound signals. How to Train Your Pet --- STEP 1: Place the doorbells on the doorknob STEP 2: When your dog needs to go out, bring him to the doorbells, ring the bells with his paw and give him a command, then open the door to let him out. STEP 3: Repeat the process over and over again when your dog needs to go out, for three weeks or less, always giving the same command and praise.