standard 18650/3. 7V/2200MAH high-capacity lithium battery2:USB interface charging, charging time is about 6 hours3:3 speed control, adjust your own air flow according to your needs

1: 3 speed control, adjust your own air flow according to your needs

2: The use of 4. 5W brushless motor industrial fan (4 inch),large air volume long life

3: The battery compartment is a removable structure to facilitate the user to maintain and replace the battery

4: Adopt international standard 18650/3. 7V/2200MAH high-capacity lithium battery to provide long use time and strong power output

5: USB interface charging, charging time is about 6 hours