Advanced Ultrasonic Squirrels Repellent: This ultrasonic dog repellent uses advanced ultrasonic technology to generate powerful ultrasonic waves under strong flickering lights. With a built-in high-sensitivity PIR motion detection sensor, the ultrasonic cat repellent outdoor will detect pests through infrared sensors and activate the ultrasonic system to trigger at an angle of 110 and a distance range of 25-30 feet for optimal performance. Effective & Safey Humane DesignRepellent animals in a humane way, this ultrasonic solar animal repeller is your best bet! This animal repellent is designed to keep animals away rather than harm them, which is humane . It's a humane way to deter mice, dog, cat, deer, fox, wolf, rabbit, owl,raccoon, bird, and most other wild animals so as to protect your courtyard, chicken coops, livestock, farmland, orchards, and much more other properties. Solar-powered & WaterproofEquipped with solar panel as the power supply, cost effective and eco-friendly to maintain a long time all day head standby. On the outdoor do not have to worry about the product will need power outlet. The ultrasonic pest repeller outdoor is IP44 waterproof, rugged hard plastic construction that it to work under any weather, water resistant,, windproof, sun protective and rustless.Multiple Modes & Easy Adjustment: The solar powered bird repeller outdoor has 4 repellent modes and 4 sound wave sizes. Different modes can expel different animals. When the infrared rays sense the animal, the outdoor cat deterrent will turn on the ultrasonic wave and the red and white LED flash until the animal is driven out of the range. You can set squirrel repeller according to your needs, and different sensitivities can effectively act on different animals. Keep Pests Away:This ultrasonic animal repellent features the most advanced ultrasonic technology which creates a powerful ultrasonic wave(15khz-60khz), accompanied at the same time by an alarm sound and 360 blue and white flash lamp. Once animals enter the protection range, the PIR sensor starts to work, then it will emit ultrasonic waves and the red light will be turned on so that keeps them away from the protected area., and will trigger at an angle of 110 and 26-33Ft distance range.