Solar-powered sonic spikes offer a chemical and poison-free alternative for driving moles, gophers, and other rodents out of the lawn. Sonic pulses penetrating through the soil every 30 seconds, sending burrowing rodents scurrying away. No batteries are required: 1 solar charge will last up to 5 days. Also waterproof, built with a mow-over design, and will not harm pets. Operates in a circular pattern, approximately 95' in diameter.