SOUND WAVES: The solar mole repellent vibrates and sends out low-frequency sonic pulses of 400 to 1000 Hz in all directions every 30 seconds, which does not physically harm these pests. Simply press the ultrasound for 2-3 seconds and pause for 30 seconds before continuing. They simply feel uncomfortable and chase them away. The solar mole repellent is an environmentally friendly way, ideal for garden, farm and greenhouse. EFFICIENT SOLAR CHARGING: Upgraded 7cm * 9cm amorphous silicon solar panels. Increase the output power by 10%. It can reach a conversion rate of 93%. Powered Powered by a solar cell, the Solar Mole Repeller automatically draws energy from the sun 24/7 during the day to continue working at night, no power consumption, no cost, very environmentally friendly and saving electricity costs. Eco-friendly Materials: Solar mole repellent made of high-quality ABS and aluminum tubes, IP65 waterproof and corrosion-resistant, and will not burden the ground even after long-term