This portable solar standing fan is the perfect off-grid cooling solution for indoor and outdoor use. Featuring a high-efficiency 30W Grade A monocrystalline solar panel with an adjustable tilt bracket, it maximizes sunlight absorption for reliable power in backyards, greenhouses, farms, and camping sites. Powered by a quiet 25W brushless DC motor, it delivers steady circulating airflow to reduce heat and humidity in bedrooms, workshops, and outdoor work areas. The upgraded metal frame with multi-layer anti-corrosion coating provides rain, frost, and high-temperature resistance for all-weather durability. Equipped with a 1500mAh built-in battery and smart dual-power system, it prioritizes solar power and switches seamlessly to DC charging on cloudy days. Three adjustable wind speeds meet different cooling needs, with ultra-quiet operation below 45dB. Additionally, the integrated USB port supports emergency phone charging outdoors, making it a practical, portable, and energy-efficient cooling fan for daily and off-grid use. Material: Steel.