Description WeI recommend putting one at 5 minus 8 meters. Feature: 1.Solar power equipped with solar panels and rechargeable batteries, which can absorb sunlight, work longer, no need to replace batteries and save energy. Safe chemicals for your children and pets. its working principle is to send sound and vibrating waves every 30 seconds. ultrasonic pulses will enter the soil to produce sound waves and vibrations to ward off buried pests such as squirrels, snakes, rats, moles, scorpions and other pests. use harmful chemicals and poisons that can harm the soil, pets and limbs. 2.Convenient installation and excellent waterproof performance This product is easy to install and requires no wiring. It is rainproof and waterproof, and can work continuously even on rainy days. But it should not be soaked in water for a long period of time. 3.Wide range of minus applications suitable for your garden, farm, rice field; can resist moles, squirrels, rats, dandruff and other rodents destructive. Specification: Material: ABS Black colour Length: 24,6 cm Size of solar panel: 40*40mm Type: insect solar repellent Battery: 600mah Charging method: eco-friendly solar panels Charging time: 6minus8 hours in the sun (depending on the weather) Instructions for use: Choose a place with no shadows and coverage, then dig a hole in the ground to place the equipment. insert the pile (pole) into the ground, making sure that the top is about 1 or 2 inches above the ground. place the soil around the equipment and fixeminuso on the floor. Then slide the power switch to the on position, the solar panel will start charging and start working after being fully charged. 2.For best results, make sure the mouse repellent is fully illuminated for normal operation. Apply a solar mosquito repellent every 100 feet to the affected area. before the terrestrial rodent begins to leave the area, it should be used continuously for 7-14 days before it is completely removed. Package list: 4 ultrasonic mouse solar repellent