4 Adjustable SpeedsThe portable fan supports easy one-button adjustment of 4 speeds: 1-3 speeds for crescendo and 4 speeds for natural wind, which can meet your different needs. LED digital display, you can easily check the remaining power to avoid sudden power failure. (press and hold for 3 seconds to power off). Mobile Power SupplyPower bank handle design, not only a handheld fan, but also a perfect choice for power supply. Outdoor mobile backup, charging your phone when needed, no need to carry bulky extra power. Lightweight and PortableDimensions are 16.9 x 8.1 x 1.5cm , the weight is only 140g, easy to put in your pocket and carry; Equipped with a lanyard, it can be hung around the neck, very suitable for outdoor activities and travel, easy to carry. USB chargingEquipped with Type-C charging interface , built-in 3000mAh high-capacity battery, can be used for 4-10 hours, and the battery life is long, allowing you to enjoy outdoor activities such as travel and work. It can be charged from a normal USB outlet, laptop, power bank or car charger. Multifunctional FanCan be used as a fan laptop, neck fan, desk fan or cell phone holder; The multi-functional usb fan is a good companion for cooling off when watching dramas, working, traveling and exercising, and it is very suitable for hot summer days.