Note before use-Please note: the charging time must be completed within 4-5 hours. Please remember not to charge too long. Please use the charging cable that comes with the product for charging. The adapter and the soldering iron cable need to meet the 5V/0.5A standard. Please use the USB charging plug to charge the fan, because other devices cannot guarantee the proper voltage and current. Strong Wind-Using the latest dynamic technology, the maximum fan speed has reached 3200rpm. More airflow, but less noise Lightweight and Portable-Small (3x2x6 inches), exquisite and compact, it can be easily put in your pocket. Weight (110g), very suitable for outdoor activities and travel, or put it on the table. Quiet and comfortable-The use of brushless motor runs more stable, low sound, strong power, heat dissipation is not hot, and long service life Long battery life-8 hours of battery life, 3 gears, 2000mAh battery or USB power supply, free mobile phone holder Instructions: 1. Press the power switch once to start first gear; press twice to start second gear, press 3 times to start third gear; press 4 times to turn off the fan, and so on. 2. This product uses USB 5V input voltage to charge, please do not use too high or too low voltage for charging.