Solar powered sonic spike that drives moles and gophers away. No batteries required. Offers a chemical and poison-free alternative for driving moles, gophers and other rodents out of your lawn. Sonic pulses penetrating through the soil every 30 seconds, sending burrowing rodents scurrying away. One solar charge will last up to 5 days. Also waterproof, built with a mow-over design and will not harm pets. Covers 7,500 sq. ft.