New Version Upgrade: The ultrasonic animal deterrent features a passive infrared sensor (PIR) that sensitively detects movement and triggers the ultrasonic speaker to emit powerful ultrasonic waves inaudible to humans, along with upgraded flame light. Combining sound waves and visual disturbances targets animals' auditory and nervous systems, creating discomfort to effectively repel them. Wide Coverage & Applications: This outdoor cat deterrent has a detection range of 20-25 feet with 110-150 coverage angle, providing comprehensive outdoor protection. For optimal results, continuous use for 2-3 weeks is recommended. Ideal for protecting farms, gardens, yards, orchards, lawns, and vegetable patches from unwanted animals. Adjustment Method: The deer deterrent features two control buttons: "Sensitivity" (lower button) adjusts detection sensitivity and range (turn knob clockwise to increase protection area); "Frequency" (upper button) controls ultrasonic frequency (turn clockwise to increase frequency). Multiple modes available for different needs. Energy-saving & IP65 Waterproof: Solar panel top converts sunlight into electricity for eco-friendly operation, with additional USB charging capability. IP65 waterproof rating ensures all-weather durability. Easy to Use: First-time users should solar charge for 2 days in direct sunlight. After assembly, install approximately 9-10 inches above ground in a sunny location covering the protected area.