Product description Specification: Solar panel: 4.3V, 20mAh Battery: 3.2V, 250mAh rechargeable battery Frequency: 400Hz 100 Height: 260mm / 10.24" Diameter: 70mm / 2.76" Product selection: 2pcs, 4pcs 1. [Working method]: The solar probe deflector vibrates and emits low-frequency sound pulses of 400-1000 Hz in all directions every 30 seconds. This method does not physically harm these pests; it simply makes them uncomfortable and drives them away. No death, no poison, no traps. This solar repellent offers an eco-friendly approach, making it perfect for gardens, farms, and greenhouses. 2. [SOLAR OPERATION & WATERPROOF]: Featuring a solar panel at the top of the device, it harnesses solar energy to conserve power and protect the environment. It can also be recharged via USB cable. This outdoor repellent is constructed from high-quality ABS plastic with weatherproof and UV-resistant properties, safeguarding against splashes from all angles, and able to endure rain, snow, or intense sunlight��ideal for gardens, yards, and farms. 3. [Environmentally friendly materials]: Made from premium ABS and aluminum tubes, the device is IP65 waterproof and corrosion-resistant, ensuring it doesn��t damage the ground even after prolonged use. The green outer casing can easily blend in with plants and doubles as a garden ornament. 4. [Wide effective work area]: The device operates in a circular pattern, covering an area with a radius of about 15 meters and up to 700 square meters. For the most effective results, it is advisable to install two devices every 100 feet in areas frequented by moles. 5. [Easy to Install]: This product is user-friendly with a wide infrared sensor range: simply unbox it, choose your preferred mode, and insert the repeller into the ground, mount it against a wall, or place the top part on a flat surface.