Effective solar-powered rodent repellent – For optimal results, we recommend placing a rodent repellent every 30 meters on your lawn when landscaping. It emits a 3-4 second sonic pulse every 40 seconds that penetrates the soil and drives pests away from the area where the sound is transmitted. Safe to Use – Humane and safe for pets and children. Mole repellent devices keep moles away by emitting a sonic pulse. They do not harm animals in any way, as they do not contain any chemicals, poisons, or dangerous ingredients. Effective and Wide Range: Ultrasonic mole repellent devices emit 3-4 seconds of low-frequency pulses every 20 seconds. These pulses penetrate the soil and deter moles from entering protected areas, as moles are sensitive to noise and vibration. This is an effective way to prevent them from damaging outdoor areas such as lawns, yards, and gardens. Solar Powered: Economical and Safe: The solar mole repellent with a built-in, high-quality polycrystalline silicon solar panel