When PIR detects the movement of an animal and triggers it, the animal repellent will sound an alarm, strobe lights and ultrasound to scare away the animal. After the animal leaves, it will automatically return to sleep mode. This insect repellent can effectively repel animals, but will not harm them. Due to the complex functions of the product, it will take a while to be effective.It is normal that half of the LED lights with the red indicator light are off. Get rid of animals by sounding ultrasonic siren and powerful flashing LED strobe light. Very effective for repelling cats, dogs, rats, foxes, birds, raccoons, skunks, rodents, deer, wild boars, etc. The product has 5-level function adjustment, please read the manual carefully. Mastering performance settings allows your product to achieve optimal efficiency. Setting 4th and 5th gears works well. Solar and USB cable charging. There is a solar panel on top of the device for easy charging. It can also be charged indoors for 7 hours using a 5V adapter. Suitable for places where power is difficult, such as farms, gardens, lawns, nurseries, manors, orchards, etc.