This device transmits low-frequency vibrations to cause moles & voles to exhibit earthquake flight behaviour. For an optimal effect on the unwanted rodents the device should be placed as closely as possible to the spot where most of the animals appear. To operate the device, simply insert it into the ground, up to the upper part of the case. The integrated solar cells provide sufficient power & also recharge the integrated rechargeable batteries. That ensures that your Anti-Mole device can work at night too, thanks to solar power.