Don’t kill or poison the critters! You can still keep your garden healthy - just use the SolarMoler as an underground “keep-out” sound that repels moles, voles, and shrews. And you won’t need any wires going across your paths - the built-in solar panel provides power. Just push the stake in the ground and keep a garden up to 7000 square feet safe for plants. Internal NiMH battery charges by day to ensure around the clock operation. 16” stake, 7” diameter.