Portable Small Fan Quiet Rechargeable Office Desktop Fan Feature key function: first turn on the power on the back. Second, adjust the appropriate fan speed by repeatedly touching the front power button (low speed > medium speed > high speed). Finally, turn off the power on the back use. The stand of this desktop fan can be rotated for easy adjustment of the wind angle you need. The fan can be folded for easy portability. Perfect for use at home, office, desk or travel. 3-speed-quiet design: low/medium/high speed levels. The three-speed design gives you more options in different temperature environments. With a silent construction, this USB desk fan is designed to be-quiet while providing high airflow. It is to work or sleep with you without disturbing you. Built-in 1200mAh large capacity battery (3 hours full charge), rechargeable via USB cable, computers, laptops, power, wall chargers and any other USB-enabled power sources. Product manual Physical column size: 28*17*17CM Actual size folding: 7*17*17CM Power: 5W Battery capacity: 1200mAh Charging method: usb power interface Wind speed adjustment: three gears Detachable or not: Detachable Is it foldable: yes