[BARK STOPPER FOR ALL TYPES OF DOGS]: The Anti barking device with the latest ultrasonic technology, suitable for all breeds and sizes of dogs. The bark control automatically emits a high pitched tone that only dogs can hear. Automatically sense the sound of the dog, once the dog stops barking, the ultrasonic barking controller automatically stops emitting ultrasonic waves. [SAFE FOR DOGS AND HUMANS] The dog barking deterrent has no electric shock, no irritating smell, no beeping, safe for pets and harmless to humans, the anti-barking device will automatically emit ultrasonic waves to stop dogs from barking, perfect for when you Create a peaceful environment for your family and neighbors by asking your walking dog to be quiet when you leave your dog. If the dog is hard of hearing or aggressive, the device may not work as intended. [STOP DOG BARKING INDOOR & OUTDOOR] The anti barking device is tested to get the best results within 32 feet, it completely frees your hands compared to traditional dog trainers. You can easily train your dog's behavior by turning on the knob. Great for stopping neighbors and homeless dogs from barking outdoors. [HIGH EFFICIENCY & USB RECHARGEABLE BATTERY] This rechargeable anti barking control device with indicator light is easy to use. 30 days of use on a 5-hour charge, saving you endless hassle and battery investment. No need to install batteries, it works right out of the box. (It is recommended to fully charge before use, the effect will be better) [IP4 RAINPROOF PROTECTION] Our Anti barking device can be easily hung on a tree, wall or fence post, it can work well even in windy and rainy days, 2 mounting screws and brackets are included in the package. NOTE: The power of the anti bark device for dogs may be consumed during transportation, please fully charge it before use. Long-term non-use of the product will also cause battery damage. Please charge the battery fully before storing the product, which can effectively prolong the life of the product.