【Wide Effective Working Range】The effective range of the solar ultrasonic repellent is a circle with a radius of about 15 meters, and the effective range is 300 square meters. This product is suitable for open lawns, parks, farms, gardens and other open spaces. For best results, it is recommended to install 2 devices every 100 feet in areas where rodents frequently occur. 【Solar Charging】Powered by a solar cell, no additional battery is required. By installing it in a sunny place, you can still charge the built-in battery and don't have to worry about running out of battery. As the precision performance of the solar panel has been improved. A full charge can continue to work for 5-7 days to ensure normal work on rainy or cloudy days. 【Waterproof and Durable】The mouse repellent is made of high-quality ABS and PVC materials, it is not easy to corrode when placed outdoors for a long time. This mole repellent has good waterproof performance and is not afraid of rain. 【Harmless to humans