Intelligent frequency conversion ultrasonic waves, safe and efficient repellent Multi-frequency sound wave coverage: releasing 20-60kHz frequency conversion ultrasonic waves, designed for different animals' hearing sensitivity ranges, stimulating their nervous system and forcing them to escape actively. No chemical pollution: no poisons, traps or chemicals are used, harmless to humans and animals, suitable for use in the home and pet surroundings. Wide range of repellent: single effective coverage of about 50-80 square meters, 2 pieces combination can cover a larger area, suitable for courtyard, warehouse and other multi-scene protection. Strong light flashing + sound wave linkage, upgraded repellent effect Built-in red LED strong light flashing function, automatically turned on at night, through visual stimulation to enhance the repellent effect, especially for felines. The dual modes of sound and light can be turned on independently or at the same time to flexibly respond to different animal infestations. 3. WATERPROOF AND DUSTPROOF DESIGN, OUTDOOR DURABILITY adopts IPX4 waterproof grade housing, rainproof and moisture-proof, adaptable to outdoor changing weather. High temperature and anti-aging material, long-term exposure to the sun without deformation, the service life of up to 2-3 years. Solar + USB Dual Power Supply, Energy Saving and Environmental Protection Solar Charging: High-efficiency solar panel on the top, 4 hours of average daily light can meet the whole day operation, energy saving and power saving. USB emergency charging: rainy days or insufficient light, you can quickly charge through the USB port to ensure continuous protection. Convenient installation, easy operation No wiring required, equipped with ground plug or wall mounting bracket, can be fixed on the grass, wall or ground. One-button switch design, easy to operate for both the elderly and children; low battery indicator reminds you to charge in time.