1. Solar Mole Repellent Powered by solar panels. There is no need to replace the batteries. This is an energy - saving and environmentally friendly solar pest repellent. When using the mole repellent for the first time, it needs to be charged in the sun for two days to help drive away rodents, moles, gophers, groundhogs, chipmunks, voles, and snakes in lawns and gardens. 2. Working Principle The solar mole repellent emits an acoustic pulse through the soil about every 20 seconds, which may interfere with and stimulate moles to leave the area covered by the sound waves. 3. Safe for Children and Pets This groundhog repellent stake uses scientific methods to help drive away moles. It is unlikely to pollute your garden and is generally safe for humans, pets, and plants. 4. Wide Coverage Each mole repellent stake can cover up to around 7,000 square feet in areas where rodents are active. It is recommended to install one mole repellent stake every 70 feet. 5. Waterproof Design The solar panel of the gopher repellent is protected by an ABS plastic housing. It can work properly even on rainy days. To reduce the impact on the charging of the solar battery, it is advisable to keep the panel clean.