DAPRIL FITMAKER Solar Powered Mole Repellent, Solar Repel Mole Chaser Mole Gopher Vole Repeller Spikes for Yard Lawn Garden Waterproof (2 Pack) (Advanced) Solar Powered- A high-tech solar panel is built in the solar mole repeller. The battery will recharge from the solar panel automatically. A full solar charge in full sunlight for around 4 hours will enable the gopher repellent to operate for 4 days even in unfavorable weather without interruption. The battery life is about 2 years. Easy to Use--Just take it out, connect the head and spike, then directly inserted it into the soil, Make sure the top part is at least 2 inches above the ground. Clean and Safe-- The mole repeller is harmless to environment, pets and human. The sonic pulses and vibration are emitted at 400 Hz in all directions every 30 seconds. It is environmentally friendly and eliminates the use of mole traps, mole killer or mole poison. Weatherproof-- Suitable for all weather conditions. But Choose the best sun location, so the solar panel to can receive the light as directly as possible. Note--The Mole has a strong dependence on the familiar land. If your yard is badly damaged by the mole, you need to cover the old holes each day while using this product. And plug them next to the latest holes to restore the health of the land little by little every day. In this way, this product will be very useful. If your yard is badly damaged by the mole and you do not want to cover the old holes each day, please choose other products to solve your problem. Thank you!