WoSports&reg; Solar Ultrasonic Mole Rodent Snake Repeller Pest Control for Outdoor Garden Yard 2 Pack (Mice Pest Control Repeller) 1. The solar mole repeller is effective within an area of 650 square meters. 2. Effective on rats, rodents, mice, different frequency can be made By emitting sound waves, the Frequency Conversion Solar Mole Repeller drives away underground rodents very effectively. The sound waves will irritate them, simulate danger, and repel them away from the irradiated area. 3. Idea pest control device to keep rodents snakes away from your garden or lawns by utilizing both sonic wave sound and vibration technology. Applicable to outdoor gardens, nurseries, lawn and other surface and underground 4. To make the best use of the product, we strongly recommend an installation of 2 devices at every 30 meters for ground areas frequented by rodents. 5. The Advanced Solar Electronic Snake Repeller has high-spec solar panels and an aluminum cannulation. The aluminum cannulation give more durability and makes it easier to insert in the soil.