SAFETY & HUMANIZED DESIGN: solar ultrasonic animal repellers have 4 different sensitivity modes that can work effectively on different animals. Eco-product. Scare away the animal intruders with an ultrasonic wave and flashing light, which is humane and harmless: no chemicals, no traps, no dead animals. EFFECTIVE DETERRENCE: This ultrasonic mouse repellent features state-of-the-art ultrasonic technology which creates a powerful ultrasonic wave, accompanied at the same time by an alarm sound and flash lights. The built-in motion detection sensor is highly sensitive and will trigger at an angle of 360 degrees and 33ft distance range, for maximum performance. SOLAR POWERED & USB CABLE: The animal deterrent top solar panel can collect energy to charge a rechargeable battery in daytime; It also can be charged with included USB cable. Please charge the device before use. ENERGY SAVING & WEATHERPROOF: Powered by solar panels, this product is cordless, low power consumption, and eco-friendly.