A. 【Rechargeable Battery】The portable fan is powered by an upgraded rechargeable battery and can be charged via a USB cable via a wall charger, power bank or computer. Fully charged fans can work for about 3-6 hours. The portable fans use a Type-C port and come with a USB cable for convenient charging and cooling comfort. B. 【Strong Wind and 5 Speed Adjustment】The Huang Jia fan has an upgraded brushless motor, strong and windy, which can quickly cool you down in the hot summer. It has 5 speed levels for you to choose according to your occasions and needs, and you can adjust it by pressing the power button. C. 【4-in-1 Multifunctional Fan】You can not only hold it in your hand, but also hang it around your neck with the hanging rope (included) to free your hand. You can also fold it and place it on the table as a small 90-degree rotating fan, or simply use it as a desk fan by inserting it into the base (included). D. 【Digital Display】The portable fan has a high-definition digital display that can display the current wind speed and remaining electricity, so it can be easily adjusted at any time. Keychain design, so you can hang the fan on your bag or backpack when traveling, climbing mountains, camping, etc. E. 【180-degree foldable fan】This portable fan can be folded 180 degrees, and you can flexibly adjust the angle of the fan to ensure a cool fan. The foldable fan is small in size (21x9x3cm) and lightweight (150g). You can put it in your handbag or purse when going out without taking up much space or weight.