1. [4 Adjustable speed levels] - This mini fan has 3 speed levels (low/medium/high), which can be adjusted by repeatedly pressing the power button. 4 fan blades, strong wind, wind force up to 3 meters. Brushless motor makes the fan durable. 2. [Battery driven fan and USB power supply] - Portable handheld fan uses rechargeable battery to run, and can run for 3-13 hours after fully charged. The small fan is very portable and can be used indoors and outdoors without cable wiring. Through a wide range of USB ports, you can use USB charging cables to connect to computers, power packs, laptops and other devices, and enjoy the cool wind wherever you go. 3. [Removable fan bracket] - With the removable fan bracket, you can use it as a desktop fan in the office, or you can use a handheld fan to carry it with you to solve the heat problem on the road. Meet your cooling needs throughout the day. At the same time, the fan base can also be used as a mobile phone support for video viewing. 4. [Portable and lightweight design] - When you go out, you can put it in a bag and take it anywhere, especially suitable for summer travel or outdoor sports. (Note: If you do not use this product for a long time, please fully charge the battery and save it to avoid battery damage!)