Upgraded Version 5-blade USB case fan and brushless motor, produce powerful breeze with lower noise (between 20-30dB). 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 gear with noise below 20dB, conducive to sleep; Second-speed nature designed for work and study; Cool strong third gear, help you enjoy outdoor leisure. One switch simplifies operation. USB Powered With 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 be rotated 360 degrees, making it very flexible. You can adjust the tilt of the fan 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 (0.18kg), portable and compact, perfect for home, outdoor activities and travel.