Protection against noise pollution: the solar repeller vibrates and emits low-frequency sound pulses of 400 Hz every 30 seconds in all directions that do not harm the body to these pests. Human way to drive out plague: No death, no poison, no trap. Solar repellent is an eco-friendly way to minimize damage to your farm, garden, lawn or yard caused by moles, voles, gophers, mice and other digging rodents. Full Coverage : Solar pest repeller shines in all directions up to 100 square meters. It is recommended to use multiple devices to achieve even greater coverage. It usually takes 2 weeks or more for the pests to leave the area. Efficient Solar Charging:A high-tech solar panel is built into the solar mole repeller. No need for extra batteries, it recharges automatically via the solar panel. It absorbs energy throughout the day and works all night to keep moles and rodents back.