3 In 1 Effective Potty Training --- Pet doorbell 3 bells + dog training rattles whistle are the perfect choice for you to train your lovely dog. An easier, better way for your dog to communicate! Teaching pet to ring a bell to go out out or go to the toilet, instead of scratching on the door and bark to get your attention, Set of three bells can be placed outside or inside the door. Clear Ring --- High quality and nice sounding bells 7 Big Extra Loud Bells yet easy on your ears to attend to your pet's nature call wherever you are in the house. Because it is not hanging on the door, the pet can press the bell with the paws to make the sound louder and avoid missing bell signal. Premium Quality & Adjustable Design --- This Dog Training Bells and its belts are custom made and tested thoroughly for its ruggedness. Belt is made from heavy duty nylon material that lasts longer than other cheaply made alternatives. Our premium quality dog doorbell comes with a snap, easily adjusting the length between 12" and 15" from the ground. Works on any type of doorknob, handle or hook that you want to affix it to. How to Train Your Pet --- STEP 1: Place the doorbells on the doorknob. STEP 2: When your dog needs to go out, bring them to the doorbells and ring the bells with their paw and give your dog a command, then open the door to let them out. STEP 3: Repeat the process again and again when you dog needs go out, for three weeks or shorter, always giving the same command and praise.Then you dog will be remember this way.