Rechargeable 4000mAhBattery JISULIFE handheld fan built-in 4000mAh battery, TYPE-C charging port only 3 hours fully charged can be used continuously for up to 16 hours, speed 1:soft breeze 16 hours, speed 2: gentle wind 10h, speed 3:strong wind 4h.Powerful & Cool JISULIFEportable fan design 4 turbo wide fan blades plus innovative inflow wind cover, can be faster and larger area of cutting air, such as natural wind gently cool, compared to other handheld fans, innovative fan blade wind power to improve 90%, the fastest motor rotation speed is up to 4400RPM.Lightweight & ConvenientJISULIFE hand fan size mini, light weight (3.35 x 1.59 x 6.46 in, 175g), light in the hands, put the desktop stable, easy to put in the bag, lanyard hole design, to meet your more ways to carry. Suitable for travel, commuting, waiting in line, shopping, camping, office, outdoor activities,etc.Material UpgradedJISULIFE mini handheld fan blade is made of PP material, thin and cutting wind evenly, the body is made of high-quality ABS plastic material fine micro-sand feel, long use does not fade for use in the summer. This is a surprise summer gift for boys, girls, men, women and children.