HOW IT WORKS: The repeller vibrates and makes noise every 30 seconds, so rodents sound like a natural danger signal and avoid the area. To cover a larger area, multiple devices should be used simultaneously. Rodent repellants can protect your garden and lawn from moles, voles, mice, rats, and other burrowing animals. Typically, it will take about 2-4 weeks to remove from your garden. Non-toxic and safe for children and pets: The device will not harm humans or animals. It does not use harmful chemicals, traps or poisons to kill/get rid of animals. It uses vibrations and sound pulses to penetrate the ground, leaving an unbearable environment for underground burrowing rodents and forcing them to leave the property and find other places to live. Waterproof and Solar Power: Waterproof adopts sturdy structure and sealed design, which enables it to work under water, wind, sun and rust. Snake repellers are made of high quality materials to ensure maximum durability and longevity. The mouse repellent is charged by polycrystalline silicon solar panels to accumulate power for operation during dark hours. Easy to install: Open the driver. Insert the nails into the ground (if the ground is hard, you may need to dig a hole), making sure the top is level with the ground above the ground to avoid a tripping hazard. The unit is solar powered, so install it in a sunny location to fully charge the unit. It is designed for outdoor use such as lawns, gardens. Large Coverage Area: The maximum effective coverage area of each insecticide is 6000 square feet. Ultrasonic waves penetrate the ground to push the repellent away.