[Product Specifications]: capacity which takes about 3 hours to fully via USB and lasts between 7-9 hours on battery mode alone (continuous operation under direct sunlight on SUN mode). [Portable and Efficient]: With its compact size and design, this solar fan is easy to carry around, making it great for outdoor activities. It operates quietly and provides a natural with its 7 blade design that offers increased diameter and wind power. [Solar Powered and USB Fan]: This portable fan is powered by solar , low noise working under direct sunlight. The brighter the sun, the faster the fan works. It also comes with a USB charging feature for convenience. [High Performance Motor]: Equipped with a quality motor that ensures uniform rotation speed, this fan delivers strong wind power. Its high speed motor can reach over 5000 rotations per minute, ensuring long service life. [scope] Widely suitable for outdoor camping, hiking, fishing, backpacking, trekking, climbing, etc.