Ultrasonic Vibration Insect RepellentThe sonic pulse emits a sonic pulse every 20 seconds, penetrating the soil and forcing pests to evacuate the area covered by the sound. Ultrasound stimulates them, simulating danger and repelling them from the irradiated area. Solar PowerEquipped with solar panels and rechargeable batteries, able to absorb sunlight and work longer. No need to change batteries. In the absence of bright sunlight, the mouse repeller's battery charge time is 3 to 4 hours and it can be used for 5-7 days. Environmental Protection & SafetyCailing rodents are almost blind, but extremely sensitive to sound and vibration. Our sonic mouse repeller emits sound pulses and ultrasonic waves without using any harmful or toxic chemicals, which is 100% safe for children, pets and people. Will not contaminate your garden and farm plants or crops. Waterproof and DurableMade of high-quality ABS and aluminum material, corrosion-resistant, safe and chemical-free. With IP65 waterproof design, Sonic Vole Mosquito Repellent can work continuously day and night even in rainy days. The economical rodent repellant can be used for a long time without burdening the floor. Wide CoverageWorks in a circular pattern with a radius of about 15 meters, covering an area up to 650 square meters. Just choose an optimal sunlight position so that the solar panel receives the light as directly as possible, then turn on the ON/OFF switch. It will effectively repel snakes, moles, gophers, rodents, mice, voles hiding in lawns, gardens and yards.