About this item Powerful deterrent. These stakes work by sending vibrations into the surrounding earth that fool the critters into thinking there is seismic (earthquake) activity occurring. Humane solution. This mole repeller scares the critters into seeking shelter elsewhere without harming them. It's certainly worth considering if you're looking for a low-maintenance and humane way to keep rodents away. Easy to set. It is easy to switch on and it instantly buzzs into life. The item is sturdy enough when pierced deeply into the soil. You can hear the faint buzz of each stick. Solar powered. There is a solar cell on the top that converts sunlight to electricity. You can place it anywhere in your yard without having to worry about electrical outlets. Water resistance. It's very simple but good enough to respond all weather conditions. The solar panel is covered with a clear plastic lid so that there`s nowhere for water to enter.