Efficiently Powered by Solar PowerA high-tech solar panel is built into the solar mole repeller. The battery is automatically charged via the solar panel. A full solar charge with exposure to the sun for about 4 hours allows the Repellent to operate for 4 days without interruption, even in adverse weather conditions. Battery life is approximately 2 years. 5,000 square foot coverage1 pack of mole remover spikes covers approximately 40 feet radius, 5,000 square feet area square feet. It emits a sound pulse every 30 seconds. It is a penetrating ultrasonic pulse and vibration that penetrates the underground soil, which causes no physical harm to these pests, but rather makes them feel uncomfortable and run away. Safety and environmental protection Safe for the environment, humans and animals. Eliminate the use of mole traps, mole killers or mole poison. Waterproof and DurableIP44 waterproof rating, the main unit is built in a waterproof ABS plastic case . It can work normally in sparse rain, and it is recommended to take it down and take it indoors in heavy rain. The mole repeller is perfect for outdoor pest control on open patios, lawns and in the garden. Do not create mounds of moles in your gardenSolar mole repeller is a eco-friendly way to minimize damage to your farm, garden, lawn or yard from moles, voles, shrews, rodents and destructive rodents.