Anti Barking Device, 15-50FT Dog Barking Control Devices with 4 Adjustable Levels, Rechargeable Ultrasonic Bark Deterrent Behavior Training Tool [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 anti barking device for dogs indoor 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 INDOORS & OUTDOORS] Dog Barking Control Device 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 device is easy to use. 30 days of use on a 3-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) [IP65 WATERPROOF 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. NOTE: The power of the Anti barking 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. Package Include: 1 * Anti Barking Device Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)