Rechargeable 4000mAh Battery portable fan built-in 4000mAh battery, TYPE-C charging port only 3 hours fully charged can be used continuously for up to 16 hours, gear 1: gentle breeze 16 hours, gear 2: gentle wind 10 hours , speed 3: strong wind 4h. Powerful and coolportable fan design 4 wide turbo fan blades plus innovative inlet wind cover, can be faster and larger area of l 'cutting air, like the natural wind gently cool, compared with other hand-held fans, the innovative fan blade wind power to improve 90%, the fastest motor rotation speed is up to 4400RPM. Lightweight and Convenientmini size hand fan, light weight (3.35 x 1.59 x 6.46 in, 175g), light in the hands, put the desktop stable, easy to put on in the bag, lanyard hole design, to meet your more ways to carry. Suitable for travel, daily carry, waiting in line, shopping, camping, office, outdoor activities, etc. Upgraded Material mini blade hand fan is made of PP material, thin and cut the wind evenly, the body is made of high quality ABS plastic material fine micro-sand touch, long use will not fade. Perfect for summer use. It is a surprise summer gift for boys, girls, men, women and children.