Portable Foldable 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 ultra-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 ultra-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 Product size: 16.5*16.5*9cm Product packaging: 17*10.2*17.2cm Power: 5W Battery capacity: 1200mAh Charging method: usb power interface Wind speed adjustment: three gears Detachable or not: Detachable Is it foldable: yes Excellent Cooling Performance: Features a powerful 200W motor with adjustable airflow of up to 4100 CFM for effective cooling MultiFunction Cooling: Utilizes advanced evaporative cooling technology to cool and humidify the air, with the option to add frozen ice boxes for enhanced cooling Convenient Water Addition: Two easy ways to add water (top & front) without bending over, ideal for pregnant women and the elderly Includes a water level window for easy monitoring Energy Efficient & Low Noise: Operates quietly with multiple wind speeds, designed to minimize electricity consumption while providing effective cooling Portable & Versatile: Ideal for various settings including home, office, and outdoor activities Features a rechargeable battery for convenience on the go