Harmless and Safe: Ultrasonic immediately scares away birds, dogs, cats, deer, raccoons, mice, moles, snakes, mosquitoes, squirrels and all kinds of wild animals with its powerful ultrasonic and dazzling LED indicators. The signal is unpleasant to animals, but inaudible to humans. Motion Sensor: The solar-powered animal repellent is equipped with an infrared (PIR) motion sensor. The repeller activates as soon as an animal pest is detected. The sensor's detection range works up to 10 meters. Green Energy: Solar panels to charge the built-in batteries. There is no need to connect an electric wire or replace the batteries. Simply stick or hang it in the ground where there is enough sunlight. ☺ Easy to Use: Portable and small design, can be installed in the house, garden, yard or elsewhere. No chemicals or pesticides, no traps, and no dead animals. Waterproof: Made of waterproof and UV-resistant material, suitable for all weather conditions.