<b>Working principle：</b><br> Every 30 seconds, these mole repeller spikes emit ultra-low frequency sonic pulses penetrate the soil. The <br>sound is extremely irritating to moles because they are virtually blind and thus overly sensitive to <br>sound and vibrations. The sonic pulses encourage underground varmints to vacate the property and also<br> discourage return visits.<br><br> <b>Easy installation in three steps:</b><br> 1.Make a pilot hole in the ground using a wooden rod or steel rod.<br> 2.Insert the mole spike into the ground, make sure the top is above the surface roughly 1 or 2 inches. Place <br>soil around the unit, securing.<br> 3.Turn on the switch and expose yourself to the sun for 24 hours.<br><br> <b>Extensive coverage:</b> <br> Operates in a circular pattern, approximately 40-60 ft.<br><br> <b>NOTE:</b><br> Although the solar mole repellent is waterproof, it cannot be immersed in water for a long time, which will<br> affect its service life. When encountering heavy rain or rainstorm weather, please take it out of the ground<br> first, wait for the accumulated water to dissipate, and then put it in the soil.<br>