Mini Portable Small Fan Quiet Rechargeable Office Desktop Fan Feature Button 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 fan is very small and easy to carry. Perfect for use at home, office, desk . Built-in 800mAh large capacity battery (3 hours full charge), rechargeable via USB cable, computers, laptops, power banks, wall chargers and any other USB-enabled power sources. Product manual Power: 1.3W Product size: 15.5*6.5CM Battery capacity: 800mAh Charging : usb power interface Wind speed adjustment: one gears Conjunctive word:Neck Fan;Personal Fan;Bladeless Fan;Neck Fan Rechargeable;Tower Fan;Ventilador Portatil;Portable Fan Rechargeable;Neck Fans That Blow Cold Air;Portable Neck Fan;Small Fans Portable;Battery Operated Fan Mini Portable Small Fan Quiet Rechargeable Office Desktop Fan Wind power reaches, noise is low, comfortable and natural Natural and cool, experiencing the comfort of a gentle breeze all day Low decibel noise, allowing you to comfortably enjoy the coolness in the office or library Multiple wind speeds are adjustable, making your cool summer days even more comfortable