【Rechargeable 4000mAh Battery 】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 】JISULIFE portable 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. 【Material Upgraded】JISULIFE portable 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. Perfect for use in the summer. This is a surprise summer gift for boys, girls, men, women and children. 【Lightweight & Convenient】JISULIFE 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. JISULIFE Cool Summer Portable Mini Handheld Fan, it has 3 different wind speeds, built-in 4000mA large battery capacity to produce excellent airflow and ultral quiet operation. The high quality battery takes 3-4h to charge and can work for long time of 4-16h. You can also plug it into a Type C socket and charge it while in use.The portable mini fan is perfect for outdoor, travel, office, and home use. Specifications: Battery Capacity: 4000mAh Charging Time: 3-4h Working Time: 4-16h Mini Size:3.35 x 1.59 x 6.46 inch,6.17oz Interface Type:TYPE-C Speed Option:3 speeds