SAFE AROUND CHILDREN & PETS: No chemicals or poison is used in this process.Mole Repellent Stakes emits 3-4 seconds of low frequency pulses in every 20 seconds,which penetrate through the soil and discourage them from entering the protected area.Humane way to repel moles from tunnelling and causing damage to lawns,vegetable plots and flowers and seedling plant roots.WIDE COVERAGE: Each mole repellent has an effective range of up to 7000 square feet. Recommend an installation of the yard mole repellents on every 70 feet throughout your lawn for optimal performance.WATERPROOF: The gopher repellent solar panel is protected in a waterproof ABS plastic housing. So the mole repellent can work even in rainy days.Keep the Solar Panel Clean - Wiping it regularly with a damp cloth.A dirty panel will reduce the amount of sunlight available to charge the units batteries.