This alarm repeller is designed to be used only once installed. Its weatherproof design allows the product to be used in almost all kinds of weather throughout the year. Use solar energy to charge the battery, so that the product can work all the time. (Move the switch to the "OFF" position: the ultrasonic LED flashes to keep animals away) The infrared sensor head detects moving objects and triggers an ultrasonic sound, the ultrasonic sound Ultrasound emitted by humans cannot be heard, but such as dogs, cats, deer, raccoons, mice, skunks, Some outdoor animals, such as squirrels, wild boars and reindeer, will be able to hear these ultrasounds, see and see the flashing lights at LED and be driven away. (Move the switch to the "ALARM" position: ultrasonic + high-decibel alarm sound + LED strobe function) The infrared sensor head can detect moving objects and trigger a 65-degree alarm sound. 120 decibels, ultrasonic wave and strong light at the same time to prevent bad guys and big