Explanation It is designed to fold 180 horizontally, rotate 360 horizontally, hold, place on the table, or even hold it on the edge of the table. Make sure you get airflow from different directions and stay cool at all angles. Battery capacity of 4000mAh, 5 hours after charging (depending on speed) can work for 5 to 20 hours. This is a USB port charging fan that can be charged with computers, laptops, mobile power supplies, USB chargers, mobile phone adapters, car chargers, etc. Adjustable wind speed can meet the requirements of different people and temperature. If you press the button in front of you repeatedly, you can adjust the appropriate wind speed. If not in use, press for 3 seconds to turn off the power. Ultra-silent design of all-copper powered motor +7 fan blades + unique wing to make it spin more smoothly. So the wind is more concentrated, more natural and less noisy than most USB fans. You can put it next to your bed and sleep comfortably without the noise bothering you. Duration: 5-15 hours. Input: 5V/1A Life expectancy: 500 or more