ddLUCK Handfan Rechargeable Fans Portable Handheld Mini Fan Battery Operated Cooling Fan Electric Personal Fans Foldable Fans with 18650 Battery for Home and Travel(Yellow) Cute in appearance, small in size, easy to carry. Portable and convenient for travel, home, office, etc.. Adjustable wind mode: three wind speeds with brushless motor. More sturdy and produces strong wind. Built-in rechargeable lithium-ion battery but do NOT use while charging. Fully charged( but less than 10 hours) can be used for almost lasting 4 hours at the second wind speed. Environmentally friendly ABS material: safe and sturdy. Adjustable base enables more blow choices. EVA shoes make it more stable and quiet while using.