Upgraded Version 5-blade USB case fan with brushless motor, produces a powerful breeze with lower noise (between 20 and 30 dB). Stay cool while making minimal noise so you can work, read, or relax without any distractions. 3-Speed Wind The fan with 3 airflow speed settings can be adjusted to your requirements. Comfortable first speed with noise less than 20dB, suitable for sleeping; Nature second speed designed for work and study; Cool third speed strong, help you enjoy outdoor leisure. One-touch switch simplifies operations. USB Powered With a 1.2m length USB cable, compatible with 5V output USB devices, such as computers, laptops, power banks, portable chargers, and other devices with USB output. Adjustable Angle The fan frame can rotate 360 degrees, making it very flexible. You can adjust the fan's tilt up and down as needed to enjoy the cool breeze. It's very convenient no matter where you are. Mini Fan Design - Size 12.5x12.5x5cm, portable and compact, perfect for home, outdoor activities and travel.