Product description Specification: Solar panel: 4.3V 20mAh Battery: 3.2V 250mAh rechargeable battery Frequency: 400Hz 100 Product selection: 2 pieces, 4 pieces 1. [Working method]: The solar probe deflector vibrates and emits 400-1000Hz low-frequency sound pulses in all directions every 30 seconds, which will not physically harm these pests. They just feel uncomfortable and drive them away. No death, no poison, no traps. Solar Mole Repellent is an eco-friendly way, ideal for garden, farm, greenhouse. 2. [SOLAR POWERED AND WATERPROOF]: With a solar panel on the top of the device, solar power can save energy and protect the environment. It can also be charged via the USB cable. This outdoor shelter is made of high-quality ABS plastic with a weatherproof and UV-protected construction that protects against spray from all directions and can withstand rain, snow or the harsh sun. Perfect for garden, yard, farm... 3. [Environmentally friendly materials]: Made of high quality ABS and aluminum tubes, IP65 waterproof and anti-corrosion, and will not burden the floor even after a long time working. The green outer shell is easy to hide in plants and can also be used as a garden ornament 4. [Wide effective working area]: The device works in a circular pattern with a radius of about 15m and an area of up to 700 square meters . For the best possible result, we recommend installing every 100ft 2 devices for ground areas used by moles. 5. [Easy to Install]: Widespread and Wide Range of Infrared Sensors: Just take it from the box, select the mode you want, insert the repeller into the ground, mount it on the wall, or place the top directly on the flat surface.