Solar EnergyBuilt-in high-tech solar panel, can be directly charged by solar energy, no need extra batteries, save a lot of energy, practical and environmentally friendly. That only takes 5 hours to charge in the sun. Efficient and Safe The Solar Mole Repeller vibrates and generates approx sound waves. The Ultrasonic Solar Repeller is effective against rodents such as cockroaches, rats, mice, snakes and other pests, stimulates the central nervous system of mice by vibrating and emitting sound waves of 400 to 1000 Hz. It is very efficient in eliminating mole and Mouse, can drive away moles, snakes, rodents and other destructible rodents. Harmless to Humans and PetsThe mole deterrent emits pulses for 2 seconds every 30 seconds, which generate vibration and sound waves, repel mole that scare away animal such as mice, moles, voles and gophers without using any chemicals that damage the soil. The mole deterrent is not harmful to humans or pets. Wide Effective RangeThe solar mole repellent is powerful and effective, the device works in a circular pattern, with a range of about 15 meters and covers up to 650 square meters. We recommend installing 2 or 4 devices every 100 meters in the garden or on the terrace for best results. Quality after-sales serviceIf you encounter any problems when using the product, please contact us in time, we will reply to you within 24 hours and give you a satisfactory answer. If you are not 100% satisfied with our products , please give us valuable suggestions.