2 PACK DOG DOORBELLS-An Easier, Better Way for your dog to communicate Dog Training Bells are one of the easy and non-confrontational solutions to train familys best friend Using dog bells have is proven to be an easier,fun and a win-win way for your dog to communicate Instead of barking. TRAINING IS SO EASY-3 Simple Steps Training.Many of them have success on the very first day.With little to no training.Door Bells will help you make better commucations with pets come true Simple and effective and are endorsed by pet professionals. 3 LEVEL ADJUSTABLE LENGTH-This upgraded design provides you 3 level of length adjustments compared to common two length bells.This allows for easy adjustment of the length to the bottom of the door or wall based on the size of dog or the height of door.All dogs like our training dog bell QUALITY BELLS&DURABILITY-Large,thick-walled jingle bells are made from durable metals.Tasteful design of silver coating of bells keep them shiny.And jingle sounds are easy on your ears from the playful dogs.Belt is custom made from heavy duty nylon material and tested thoroughly for its ruggedness.