Portable design,strong wind. Mini 4 inch design, easy to carry, just throw into your bag or use the carabiner and lanyard to han, and the wind is strong of your cooling.
Battery type: Li-ion 18650 3.7V (INCLUDED); The fan only has one mode if you take out the battery and powered by USB.
100% pure copper brushless motor makes the fan working 10000 Hours lifetime, 3150RPM/min (other USB fan is below 2000RPM/min), high energy conservation.
High quality blade,the smaller resistance,energy conservation and environmental protection.
3 settings of the air flow speed: high, mid and low. Upon your choice, the fan works from 2.7-10.8 hours after fully charged. With one Led lamp designed on side for emergency illumination.