The Outdoor Bark Control Ultrasonic Sound is an anti-barking device that emits ultrasonic sound waves to deter dogs from barking. With a range of up to 50 feet, it is designed to be weatherproof for outdoor use. The device has four levels of operation, allowing users to adjust the intensity of the ultrasonic sound to effectively control their dog's barking behavior. Made in China, this product offers a humane and effective way to manage problem barking in dogs.