1. Using advanced ultrasonic technology, it can effectively drive away stray dogs in gardens and courtyards, which is harmless to pets and environmentally safe. 2. The device is waterproof and suitable for use in various outdoor environments, and can maintain stable performance after long-term exposure to rain and snow. 3. Simple and easy to use, just install the battery to start, automatically sense animal activities within the range and emit ultrasonic to drive them away. 4. The ultrasonic frequency is designed for dogs, humans cannot hear any sound, avoid noise interference to neighbors, quiet and efficient. 5. The protection range is wide, a single device can cover a large area, and it is an ideal choice for homes, farms and commercial places.