When an animal comes into range of the PIR sensor, the ultrasound is activated. The strong ultrasonic signal can act on the auditory system and nervous system of the animal, causing discomfort and unhappiness, and fleeing the scene. 1. Sensitivity adjustment knob (left): This knob can adjust the sensitivity and sensing distance of the product, and turning the knob clockwise increases the sensing distance. 2. Frequency adjustment knob (right): The gear function details are as follows: 0 file: off Gear 1: mode 1, frequency 13.5-20khz slow sweep 2nd file: mode 2, frequency is 15.5-25khz fast frequency sweep 3rd gear: mode 3, the frequency is 25-45khz 4 gears: LED flashing Level 5: All functions work, scan frequency from mode 1-mode 2-mode 3, and turn on the LED strobe light. 3. Charging indicator light: When the product is charging with a charger or solar energy, the red indicator light under the PIR is on, and the green indicator light is on when the battery is fully charged. product features The waterproof grade is IP44, which can be used in rainy days Two ways of power supply, solar panel or USB An infrared sensor (PIR) detects and triggers ultrasonic waves Drive away wild animals with ultrasonic and flashing lights Sensitivity and frequency are adjustable, you can choose according to your needs Adjust the working mode in time to prevent animal immunity