Dolphin 4 Inch Portable Battery Operated Fan Rechargeable USB Handheld Desktop Fan with 3-Level Speed LED Light Mini 4 inch design, easy to carry, just throw into your bag or use the carabiner and lanyard to han Using the brushless motor industrial grade fans, high winds and long life have adequate safeguards. 3 settings of the air flow speed: high, mid and low. Upon your choice, the fan works from 2-8 hours after fully charged. One Led lamp designed on side. 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. Portable rechargeable fan powered by 1800AH battery (not included), convenient to carry anywhere and anytime.