about this projectUnique Folding Design, Mini Portable: This newly designed portable fan can be folded 270 degrees, the total length after folding is about 9.2cm, very convenient to carry. Can be held in hand or placed on a tableUSB Powered: The mini fan has a built-in 350mAh rechargeable lithium battery, which can be charged by a USB charger, laptop, computer, power bank, etc. The indicator light is on when charging, and the indicator light is off when fully chargedADJUSTABLE SPEED: This handheld fan has 2 speed levels (low/high), working for 3 hours in low mode and 2 hours in high mode. Freely switch between strong wind and light wind with the power buttonSafe and Quiet to Use: The fan blades are made of soft TPE material, which is durable and safe, and can be folded automatically when the fan is turned off. The superior motor makes it quiet enough for use in offices, workplaces, outdoors, and more.