The ultrasonic repeller does not use any harmful or toxic chemicals to repel rodents without harming themselves. The exterior insect-proof zone embeds itself in the ground to start its functions. The snake repeller is also made of high quality ABS material, so it provides a stable feeling when gripping and ensures maximum durability and longevity. For optimal performance, we recommend placing the mole repellent every 90 feet of your lawn. The sound pulses emit sound pulses every 30 seconds, they penetrate the ground and also cause the pests to evacuate the area through which the sound travels. Generally, it takes about 2-4 weeks to may moles and gophers be driven from your garden. Your garden will be rodent-free. Relax knowing your lawn is protected even when it rains due to the waterproof and corrosion-resistant features of the mole and vole repellent spikes. As we aim to keep our environment clean, we lead to the use of eco-friendly energy: solar energy and rechargeable