BearsFire Mini Handheld Pocket Fan Timing Set Electric Personal Fans With Timing function 4 Speeds Portable Mini USB Rechargeable Desktop Summer Cooler Fan LED Power Visual design (Purple) Portable mini fan powered by Built-in lithium battery; convenient to carry anywhere and anytime. Battery status visible and 4 settings of time function; 4 air flow speed: high, mid, low and mild. Upon your choice, the fan works from 2-10 hours after fully charged. Different ways to charge fan with lithium battery in: connect micro USB charging cable via computer/notebook, car charger, power bank, 5V wall USB charger, 5V solar charger etc. Intelligent control, the function is perfect, the operation ifs simple,stable and reliable performance. Built-in high capacity lithium battery, charging circuit, low use cost. 100% pure copper brushless motor makes GT328H fan working 10000 Hours lifetime, high energy conservation.