TFSeven 4 Inch Vanes Portable USB Handheld Rechargeable Battery Powered Desktop Fan with 3-level Speed for Outdoor, Hiking, Fishing, Camping, Picnic, Baby Stroller, BBQ and Indoor (Blue) Portable mini fan powered by Premium Samsung 2600mAh lithium rechargeable battery (much safe and efficent), convenient to carry anywhere and anytime. 100% pure copper brushless motor makes F95B fan working 10000 Hours lifetime, 3150RPM/min (other USB fan is below 2000RPM/min), high energy conservation. 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. 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. One Led lamp designed on side. Mini 4 inch design, easy to carry, just throw into your bag or use the carabiner and lanyard to han.Three speed level to choose for meeting your needed and LED light on side for emergency illumination