【Ultrasonic Vibration Repellent】Emits sound pulses every 20 seconds that penetrate the soil and force pests to leave the area covered by the sound. The ultrasonic waves irritate them, simulate danger, and drive them away from the irradiated area. 【Solar Powered】Equipped with solar panels and rechargeable batteries that absorb sunlight and have a longer operating time. The battery does not need to be replaced. Without direct sunlight, the mole repeller's battery charging time is 3 to 4 hours, sufficient for 5 to 7 days of use. 【Environmentally Friendly and Safe】Burrowing rodents are virtually blind but extremely sensitive to sound and vibration. Our sonic mole repellent emits sound pulses and ultrasonic waves without the use of harmful or toxic chemicals. It is 100% safe for children, pets, and humans. It will not contaminate your garden, plants, or crops. 【Waterproof and Durable】Made of high-quality ABS and aluminum materials, it is corrosion-resistant, safe, and chemical-free. Thanks