Solar Power: In order to keep our environment clean, we lead the use of eco-friendly solar power and rechargeable battery for the ultrasonic solar pest repeller. It can absorb sunshine for daily function. Additionally, it must be used CONTINUOUSLY for 7-14 days before terrestrial rodents begin to move away from the area. Eco-Friendly & Safe: Sonic Mole Repeller emits sound pulses and ultrasonic waves without any use of harmful or toxic chemicals. This solar mole repeller only works based on low frequency sound vibration and is 100% safe for children, pets and people, which will not pollute your garden and agricultural plants, crops. Wide Coverage & Ultrasonic Vibration: When the pet enters the area, the infrared sensor will be triggered. The left and right angle of the infrared sensor is 110 degrees, and the effective distance is 6-8 meters, which depends on the size of the animal. For best results, we recommend 2 units per 80 feet. Waterproof and durable design: Made of durable ABS and aluminum materials, corrosion resistant, safe and chemical free, IP65 waterproof, rainproof. No radiation, chemicals or odors, safe for humans and our pets. The green enclosure can be easily hidden or used as a garden decoration.