Upgraded version USB case fan 5 blades and brushless motor, produce a powerful breeze 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 lower noise 20dB, conducive to sleep; Nature second gear 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, which makes it very flexible. You can adjust the tilt of the fan up and down as you need to enjoy the cool breeze. It's very convenient wherever you are. Mini fan design Size 12.5x12.5x5cm (0.18kg), portable and compact, perfect for home, outdoor activities and trips.