General description Ultrasonic Dog Bark Deterrent Device is designed to effectively control barking in dogs using ultrasonic sound technology. This outdoor bark control device automatically detects barking from up to 15m/50ft away and emits high-pitched sounds that are only audible to dogs, helping to deter excessive barking without causing harm. Technical specifications Detection range: up to 15m/50ft Power requirement: 9V batteries (not included) Power indicator: Yes Installation Can be hung on a tree, indoor or outdoor wall, or fence post. Usage Automatically emits ultrasonic sounds when barking is detected. Stops emitting sounds once the dog stops barking. Can be turned off to save battery when not in use.