1. AUTOMATIC ANTI BARKING DEVICEDog bark deterrent devices has an automatic bark detection function. When excessive barking is recognized, the dog deterrent devices automatically emits an ultrasonic sound to stop the barking, helping you to regain control of your indoor noise level. Our device automatically monitors and reacts to barking, providing a solution to persistent barking problems. 2. SAFE EFFECTIVE BARKING BOXOur ultrasonic dog barking control devices utilizes 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 be quiet. Designed with your pet's in mind, Our no barking device is carefully crafted to be and harmless to dogs. The innovative design helps your dog learn to control excessive barking, allowing you to enjoy a peaceful time. 3. 3 CORE ULTRASONIC 3 ADJUSTABLE MODESOur ultrasonic bark stopper is equipped with 3 ultrasonic speakers and has three adjustable modes. You can choose the one that suits your dog according to your dog's specific situation. Mode 1 (15khz30khz): more suitable for large dogs or active dogs; Mode 2 (20khz): suitable for gentle dogs; Mode 3 (30khz): suitable for small dogs. Our anti dog barking device covers up to 33 feet and is suitable for indoor and outdoor use. 4. 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 worry about using the dog barking control devices due to 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 to use outdoors.