This adjustable dog door bell is a fun and effective way to potty train your puppy. Made of durable plastic with a cheerful jingle bell attached, this hanging bell lets your dog politely ask to go outside when nature calls. Simply place the bell next to the door and teach your puppy that ringing it means it's time for a bathroom break. The adjustable length and height make it perfect for dogs of all sizes, from small puppies to large breeds. Help establish good habits from the start with this playful training tool. The bell's cheerful sound and your positive reinforcement will have your new furry friend ringing to go out in no time. Be sure to praise and reward your pup for using the bell properly.