【Safe and Effective】The ultrasonic mole repeller emits a strong vibration wave and a sound signal. The sound waves and vibrations are emitted approximately every 25 seconds and are effective in repelling snakes, moles and voles that hide in your garden. It is safe for people and animals, but we recommend placing it outdoors. [Large Effective Working Area] Our products can effectively cover 7500 square feet and protect farms, yards, lawns, gardens, rice fields and more. more more. For best results, it is recommended to install two sets every 100 feet in areas where rodents are common. High Efficiency Solar System: The rodent repeller is powered by high efficiency solar panels and placed in a sunny location for more than 8 hours, and charging usually takes 5-7 days. Since it is solar powered, there is no running cost. This is an energy-saving and environmentally friendly product. Durable and Waterproof Design: The ultrasonic mole repellent is made of high-quality ABS. It is waterproof,