Feature 

• The product is powered by two 18650 lithium batteries in parallel. The capacity of a single lithium battery is about 1200 MAH Thistory can be removed. 
•  This product has over-voltage, over-temperature,over-current.polarity, short-circuit protection and charging status indication function. (red light when charging, blue light when lithium battery is full of electricity). 
•  The product is equipped with a micro USB input charging port, charging voltage: DC: 5V, current: 1A, the product is full of electricity for about 4 to 8 hours. 
•  The product is equipped with USB output function, which can charge mobile phones, digital cameras and other electronic products (output voltage 5V, output current 1A). When use Micro USB to charge, the fan can work while charging, and the USB output port can also charge the mobile phone at the same time. 
•  The output power of fan: strong wind gear is about 4W,mid-range wind is about 3W and weak wind gear is about 2W. • Over voltage protection during charging for product, automatic protection when battery voltage reaches 4.2V. 
•  The product has low voltage protection. When the battery voltage is below 3.0V, it will enter low voltage protection and turn off the output. 

Attention 

• This product should be charged with 5V micro USB port, such as 5V charger or computer, mobile power supply, etc. 
• Do not use a charger that the voltage is too low or too high to charge. When the fan is working, 
• do not insert hard objects or fingers into the fan's protection net to avoid damaging the fan blades and causing harm to your body. 
•  Please don't stop the fan blade artificially to avoid burning out the control circuit or fan motor due to excessive current. Please don't sway the fan hard to avoid damaging the fan. 
•  Children should use it under the guidance of adults in order to avoid physical injury and product damage caused by improper use. For the first time, please replenish the electricity for about 2-4 hours.