Features: 1.The solar outdoor pest repeller is effective with PIR (motion sensor) function. It will detect any movement and activate the system to emit ultrasonic frequencies that can repel birds, , dogs, rats, , etc. The adjustable frequency allows you to select the animals you want to repel. The solar outdoor pest repeller is weatherproof and therefore designed for outdoor use. Usage: 1. the unit with the 4 screws and anchors (provided) on an area with sufficient sunlight. For best performance, it is recommended to place the unit at least 3 feet off the ground for optimal range. Make sure the speaker is facing the area you want to cover. 2. Turn the frequency dial to the animal you want to repel. Different frequencies repel different animals. Some frequencies will repel more than one animal. 3. Turn on the device by pressing the ON/OFF button once. Once pressed, the LED will turn red and activate the system and stop emitting the ultrasonic frequency automatically after 9-11 seconds.