Effective Solar ChargeUltrasonic mole repellent uses high quality polycrystalline silicon solar panels, by installing it in a sunny place, it automatically recharges from the panel solar, no need for additional batteries. This charging time is 3 to 4 hours and allows 5-7 days of use in case of absence of sun.Sun Mole RepellThe ultrasonic repellent vibrates and produces sound waves of 400 to 1000 hertz by the buzzer, which stimulates the central nervous system of the mouse, it can effective chase away destructive mice, snakes, rodents and other rodents. Sound waves do not harm pets or children, for garden, farm, greenhouse.Wide Beach EfficiThis ultrasonic repellent is powerful and effective, suitable for open lawns, courtyards, gardens, farms and other open spaces. It operates in a circus pattern, with a radius of about 15 meters and covers up to 650 square meters. For best results, it is recommended to install 2 devices every 100 feet in areas where rodents occur frequently.Durable and WaterMade of heavy duty ABS plastic and corrosion resistant aluminum, safe and chemical free. The IP65 waterproof unique designs allow you to fix the device anywhere, the ultrasonic snake repellent can work continuously day and night, even on rainy days.Quality and ServiceThe ultrasonic repellent does not contain harmful or toxic chemicals to repel rodents without injury. The green outer cover can be well hidden in plants and can also be used as garden decoration.