Apmemiss Fans on Clearance Mini Portable Small Fan Quiet Rechargeable Office Desktop Fan Fans for Home Mini Portable Small Fan Quiet Rechargeable Office Desktop Fan Feature Button function: first turn on the power switch 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 switch on the back after use. The fan is very small and easy to carry. Perfect for use at home, office, desk or on the go. Built-in 800mAh large capacity battery (3 hours full charge), rechargeable via USB cable, compatible with computers, laptops, power banks, wall chargers and any other USB-enabled power sources. Product manual Power: 1.3W Product size: 16*7.5CM Battery capacity: 800mAh Charging method: usb power interface Wind speed adjustment: one gears ?? [Satisfaction First] - Customer satisfaction is our top priority. If you are not satisfied with any of our Apmemiss product, please contact us and rest assured that we will do our best to make it right. Please refer to the size chart images and product descriptions, as well as our customer feedback, to ensure an accurate fit. Mini Portable Small Fan Quiet Rechargeable Office Desktop Fan Feature Button function: first turn on the power switch 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 switch on the back after use. The fan is very small and easy to carry. Perfect for use at home, office, desk or on the go.