Safe and environmentally friendly: The ultrasonic pest repellent will not harm any animals, plants and human beings. There are no messy chemicals or pesticides, no traps, no dead animals. The solar ultrasonic animal repellent gets rid of all animals by emitting a mixture of Ultrasound and powerful flashing LED strobe lights, scaring intruder animals and pests from leaving the area. Coverage Area - The motion sensor covers a 110 degree arc left and right, the Motion sensor distance can be up to 19.68ft(8m), working area up to 400 square feet. -- Once the animal stays near the front of the device, the PIR sensor starts working Upgraded Ultrasonic Version - Irregular and variable frequency makes it more effective in chasing away the most aggressive animals thanks to the technology of passive infrared (PIR) motion detection. Automatic frequency range adjustment - 25KHZ-61KHZ, the (PIR) detects movement and triggers the ultrasonic speaker emitting a tone that drives away animals outdoor pests like mice, rats, skunks, dogs, cats, foxes, birds, bats and more. Waterproof: IPX4, it can be installed in your house, garden, yard or elsewhere. Weatherproof with leak-proof waterproof lid.