For over 20 years, PoochieBells has been a trusted tool for pet parents across the country, helping their furry friends communicate when it's time to go out. The PoochieBells Adjustable Dog Doorbell continues to build on that legacy with a thoughtful design that grows with your dog from curious puppy to wise senior. The smooth center slide allows for easy adjustment of the hanging length, making it accessible for dogs of all sizes. Each PoochieBells set features a dog-safe design and lead-free bells that produce a pleasant sound without startling your pet. The durable strap is built to withstand daily use for years to come. Plus, each doorbell comes with trainer-endorsed instructions, making the potty training process clear, consistent, and rewarding for both dogs and their humans.