Sweeney's Solar-Powered Sonic Spike Quantity of 5: Sweeney's Solar Powered Mole & Gopher Repellent Spikes Solar powered sonic spike offers a non-toxic alternative for driving moles and gophers out of your yard Sonic pulses only rodents can hear penetrate the soil, sending underground pests scurrying away. No batteries required, solar charge lasts up to 5 days The spike is built with a mow-over design and safe to use around pets