Drive moles and gophers away, no batteries required. New, solar powered sonic spikes offer 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-second, sending burrowing rodents scurrying away. No batteries are required; one solar charge will last up to 5-day. Also waterproof, built with a mow-over design and will not harm pets. Covers 7,500-square feet.