1.[PROVEN TRAINING SYSTEM]: If youve been looking for an easy way to potty train your puppy that doesnt involve pads and sprays, look no further. Our door bell system uses your dogs natural sensitivity to sound to potty train faster. 2.[NO MORE BARKING AND SCRATCHING]: Dogs love to communicate with sound, and our bells provide your poochie with a pleasant way to tell you he needs to go out. Let your pet out to the jingle of bells rather than to annoying barking and scratching! 3.[EASY TO HEAR]: Our copper chimes ring loud and clear, while still being pleasant to the ear, so that you KNOW when your pup needs to go outside. You wont have to worry about indoor accidents caused by you not hearing your doggie ringing his bells. 4.[Adjustable Strap]: The belt comes with button to adjust the length of the bell according to the size of your pet 5.[A HIGHER LEVEL OF QUALITY]: Because our doorbells are made with genuine leather and premium quality copper bells, you can trust their durability and feel good about hanging them up in your home for friends and neighbors to see. Theyll look great hanging on your door!