RECHARGEABLE & EASY TO USE: Our sonic anti-bark device can be easily hung on a tree, garden fence, table, or dog house, very convenient to use on your or your neighbor's barking dog. The anti-bark device has a built-in 1500 mAh rechargeable battery, which can be charged for 5 hours and can be used for 30 days, simple to operate and easy to use, it's a friendly dog barking device for your furry friend (please charge the device before use). DURABLE & WATERPROOF DOG SILENCER: This anti dog barking device has an IPX4 waterproof casing to withstand all kinds of bad weather, so you don't have to use the dog barking control devices because of the weather, no matter in sunny, rainy, or snowy days, our bark stopper can stand up to the test, and you can rest assured that the dog deterrent devices is safe to use outdoors. SAFE & EFFECTIVE BARKING BOX: Our ultrasonic dog barking control device uses advanced ultrasonic technology to stop excessive barking without harming your beloved pet. The gentle yet effective ultrasound serves as a communication tool to teach your dog when it's time to stay calm. Designed with your pet's health in mind, our no bark device is carefully crafted to be safe and harmless to dogs. The humanized design ensures that your dog learns to control excessive barking without any harm. AUTOMATIC ANTI-BARKING DEVICES: Tired of constant noise? Automatic anti-bark devices are your answer. Our dog deterrent devices automatically senses and responds to excessive barking, helping you regain control of indoor noise levels. Ideal not only for indoor home use, but also for placement outside, there is no need for constant monitoring, our device automatically detects and responds to barking, providing a hassle-free solution to persistent barking problems. 33FT & 3 ADJUSTABLE MODES: Our ultrasonic bark stopper has three adjustable modes, you can choose the one that is suitable for your dog according to your dog's specific situation. Mode 1 (15khz~30khz): more suitable for large dogs or active dogs, mode 2 ( 20khz): suitable for docile dogs, mode 3 (30khz): suitable for small dogs. Our anti dog barking device can cover a range of 33 feet, ensuring effective coverage of a considerable area.