Anti-Barking Dog Device, Ultrasonic Anti-Barking, 33 Feet Automatic Ultrasonic Anti-Barking Dog Device, Waterproof for Small and Large Dogs, Outdoor Use

[Automatic Anti-Bark Device] This device intelligently detects your dog's barking within a 15-meter radius and automatically emits ultrasonic waves to distract them, thus ending the excessive barking and giving you a moment of peace. [Anti-Bark Device] The ultrasonic frequency is harmless to animals and completely inaudible to humans. If your dog suffers from hearing impairment or is aggressive, this product may not work properly. It is not recommended to use it simultaneously on multiple barking dogs. [3 Operating Frequencies] This adjustable-frequency anti-bark device is suitable for different breeds. The 15-30 kHz frequency is suitable for large, aggressive dogs; the 20 kHz frequency for docile dogs; and the 30 kHz frequency for small dogs. Recommended for dogs aged 6 months to 8 years. [USB Rechargeable] This ultrasonic dog repellent is equipped with a built-in rechargeable lithium battery. A full charge (5 hours) provides up to 30 days of battery life. Red and blue indicator lights show the battery level. [Easy and waterproof installation] This anti-barking device can be hung on a tree, wall, or fence to prevent your dog or your neighbor's dog from barking. Make sure the device is facing the dog so it can easily reach it and that there are no obstacles blocking its path.