Safe and Eco-friendly: The ultrasonic pest repeller will not hurt any animals, plants and humans. 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 ultrasonic sound and powerful flashing LED strobe lights, scaring intruding 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 400sq.ft. Once the animal stays close to the front of the device, the PIR sensor starts working. Upgraded Ultrasonic Version: The irregular and variable frequency makes it more effective in driving away the most aggressive animals with the passive infrared (PIR) motion detection technology. Auto Frequency Range Adjustment: The detects movement and triggers the ultrasonic speaker to emit a tone which chases away outdoor animals like mice, rats, skunks, dogs, cats, foxes,