Safe and Environmentally Friendly: The ultrasonic pest repeller will not hurt any animal, plant and human being. There are no messy chemicals or pesticides, no traps, no dead animals. The Solar Ultrasonic Animal Repeller gets rid of all animals by emitting a mixture of ultrasonic sounds and powerful flashing LED strobe lights, scaring intruding animals and pests out of the area. Coverage Area - The motion sensor covers an arc of 110 degrees left and right, motion sensor distance is up to 19.68ft (8m), working area is up to 400 square feet. -- Once the animal stays close to the front of the device, the PIR sensor will start working Improved Ultrasonic Version - Irregular and variable frequency makes it more effective in driving away the most aggressive animals thanks to the technology of passive infrared (PIR) motion detection. Automatic Frequency Range Adjustment - 25KHZ-61KHZ, the (PIR) detects motion and triggers the ultrasonic speaker emitting a tone that drives away outside animals like mice, rats, skunks, dogs, cats , foxes, birds, bats and more. Waterproof: IPX4, it can be installed in your home, garden, yard or anywhere else. Weatherproof with waterproof waterproof cover.