
Automatic Dog Barking Control The device intelligently detects dog barking up to 15 meters away and automatically emits ultrasonic waves to distract your dog, stop unnecessary barking and let you enjoy a moment of peace. peace and quiet. Dog Bark Stopper ultrasonic frequencies are harmless to pets and completely inaudible to human ears. If the dog is hard of hearing or aggressive, the device may not work as intended. It is not recommended to use one device at the same time to deal with the barking of two or more dogs. Level 3 Operation Adjustable frequency bark repellent for different dogs. ; 15KHZ30KHZ is suitable for big bad dogs. 20KHZ is suitable for gentle dogs. 30KHZ is suitable for small dogs. Recommended for dogs 6 months to 8 years old. USB Rechargeable The ultrasonic dog repeller contains a rechargeable lithium battery, and the device can work continuously for 30 days after being fully charged within 5 hours. Red/blue color indicates battery status. Easy to install and