General description The Waterproof Outdoor Ultrasonic Anti-Bark Control System is designed to effectively stop excessive barking without the use of electric shock. This device emits a high-pitched ultrasonic wave that is inaudible to humans but can be heard by dogs, prompting them to stop barking and move away. Technical specifications Type: Ultrasonic anti-bark device Design: Birdhouse appearance Usage: Outdoor Usage Prevents excessive barking from disturbing you and your neighbors. Suitable for dogs of all breeds and sizes. Can be hung on a tree or placed on a table in your garden or home. Other information Ultrasound is designed to create discomfort for dogs without significant punishment. Dogs may become accustomed to the sound over time.