Energy Saving: Solar powered, wireless and rechargeable, high efficiency and low power consumption. Effective: Intense ultrasonic signal to scare dogs, cats, wild boars, mice, birds and other animals away from your area, home, garden or patio. PIR Sensor: Automatically sends out ultrasonic frequency and LED light to repel the animal when it detects a moving animal within its range. Easy to Install: Can be mounted on the ground with the included spike or hung on the wall via the back slot (direct sunlight exposure). Safe and Eco-Friendly: No chemicals and no elements that threaten human health. Use ultrasonic frequency to repel annoying animals away from you.