Features: Experience peace and quiet with our advanced ultrasonic dog bark deterrents device, designing to safely and effectively silences your dog excessive barking without causing harm. Featuring abs constructions, this rechargeable bark box is equipped with four adjustable model, including a test model and three sensitivity levels, ensuring tailored bark control for dogs of all size. For pet owners look to train their dogs with out resorting to shock collars, this humanes antibarking device fosters a better relationship between you and your furry friend. Whether indoors or outdoors, our no barking device for dogs can be easily mounted in your yard, on fence, trees, or dog kennels, offering a wide coverage area up to 75 feet. With its waterproof rating, the ultrasonic dog bark deterrents stands up to any weather conditions, ensuring consistent performances and long lastings tranquility in your home and garden. Specifications: Component:ABS Size:Approx.10.50cm/4.13inch Color:Black Package Includes: 1Set Dog Bark Deterrents Device note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. ②.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.