【Rechargeable Battery】The portable fan is powered by an updated rechargeable battery and can be charged with a USB cable via a wall charger, power bank, or computer. The fans work for approximately 3-6 hours after being fully charged. The portable fans use a Type-C port and are equipped with a USB cable to ensure convenient charging and prolong the cooling comfort. 【Strong Wind & 5 Speed Adjustment】The Huang Jia fan has an updated brushless motor, strong and windy, which can quickly cool down in a hot summer. There are 5 speed levels to select according to occasions and your needs, you can adjust it by pressing the power button. 【4 in 1 Multifunctional Fan】You can not only hold it in your hand, but also hang it around your neck with a hanging rope (included) to free your hand. You can also fold it and put it on the table as a small 90-degree rotating fan, or just use it as a table fan by putting it into the base (included). 【Digital Display】The handheld fan is equipped with a high-definition digital display, which can display the current wind speed and the remaining electricity, making it easy for you to adjust as needed at any time. 【Keychain Design】Our fan has a keychain design, so you can hang the fan on your handbag or backpack when you go out for traveling, mountain climbing or camping, etc. 【180-Degree Foldable Fan】This portable fan can be folded 180 degrees, and you can adjust the angle of the fan flexibly to ensure that the fan can continue to deliver cool air to you. 【Portable and Lightweight Design】Our foldable fan is small in size (21x9x3cm) and light in weight (150g). You can put it in your purse or handbag when you go out without taking up much space or weight.