Adjust the air volume according to your needs.4.5w brush motor industrial fan is adopted， which has high wind capacity and long service life. 360-degree rotation at any angle， large-area circulating air supply. The 3.7V high capacity lithium battery with international standard is adopted to improve the long-term performance. With time and strong power output.The charging time is about 3 to 6 hours. Product specifications: Colors:Green White Yellow Red Material:Plastic ABS Battery capacity:500mAH Charging time:2-4H Operating hours:60-90 minutes Output Power:1.5-3.5W Product List: 1 X Fan 1 X USB cable