General description Upgraded Version - This portable mini USB fan features a 5-blade design and a brushless motor that produces a powerful breeze while maintaining a low noise level (between 20-30dB). It is perfect for keeping cool while working, reading, or relaxing without distractions. Technical specifications Noise level: 20-30dB Size: 12.5 x 12.5 x 5 cm USB cable length: 1.2m Usage 3 Speed Wind: The fan has 3 adjustable airflow speed settings to meet your needs. Comfortable first gear with noise level less than 20dB, ideal for sleeping. Second gear designed for work and study. Cool powerful third gear for leisure time outdoors. Single switch operation for easy use. Other information USB powered, compatible with 5V USB devices such as computers, laptops, power banks, and portable chargers. Adjustable angle: The fan frame can rotate 360 degrees for flexible positioning. Convenient for home, outdoor activities, and travel.