【Safe and Effective】The Ultrasonic Mole 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 harmless to humans and animals, but we recommend placing it at outdoors. 【Large Effective Working Range】Our products can effectively cover 7500 square feet and protect farms, yards, lawns, gardens, rice fields and more. For best results, it is recommended to install two sets every 100 feet in areas where rodents are common. 【High-efficiency solar】The rodent repeller is powered by high-efficiency solar panels, placed in a sunny place for more than 8 hours, and charging usually lasts 5-7 days. As it is powered by solar energy, there is no running cost. It is an energy-saving and environmentally friendly product. 【Durable and Waterproof Design】The ultrasonic mole repeller is made of high-quality ABS. It is waterproof, corrosion-resistant and