🐶 NEW UPGRADED TECH- This bark breaker is 100% Safe to your dogs, other pets, plants, and of course, yourself and your family.Stop excessive, noisy dog barking by emitting an ultrasonic sound to silence the dog. More effective than old version deterrents and waterproof. 🐶 MINI SIZE- Designed for easy hanging or mounting on a tree,wall or fence post. Using this technique you can make your dog no longer bark and make you have a quiet environment. Uses high-frequency sound that works to reduce excessive bark of dogs within hearing range; For dogs 6 months and older UP TO 25 FOOT RANGE. 🐶 STRONG FUNCTION- Contain sensitive microphone isolates and picks up barking up to 50 feet away to stop barking both outdoors and indoors (recommended starting mode for indoors is level 1, increase if needed). PLEASE NOTE: Does not work on deaf or hearing impaired dogs. 🐶 SAFETY & ENVIRONMENTAL PROTECTION- Safe to your dogs of any size, other pets, plants, and of course yourself and your loved ones.The ultrasonic frequency is no harmful to pets and completely inaudible to human ears.So you can rest assured that use.Operates 9-Volt batteries (not included) and will last up to 6 months depending on use. 🐶 30 DAY MONEY BACK GUARANTEE ensures your satisfaction. If our product did not work for you, please message us with your account and we will provide you with a full refund. It is our responsibility and policy to make sure that customers are 100% satisfied whenever they choose to buy our product.