This USB fan uses high-quality silent bearings, providing comforting wind while keeping quiet, 3 adjustable speeds with the minimum noise of 22 dB (almost equivalent to falling leaves). Enjoy the cool breeze without being disturbed.Lightly press the power button to switch between three modes: low / medium /high. Have more choices under different environments and different temperatures. Bringing the most personalized user experience for you.The fan is equipped with a Micro-USB port for power supply and charging, Built-in high quality 1200 mAh battery can last up to 4-6 hours after fully charged, you can connect usb cable as power cable.Lightweight design, blowing breeze from any direction.Suitable for desk, travel, office and room household