1. This design is very suitable for outdoor people. Even if the temperature is too high, don't worry about it outdoors, because this fan can calm you down, which is a necessary product in summer. 2. Emergency mobile power supply, charging+cooling in one, with USB interface, 5V/2A output, can provide emergency charging for your mobile device 3. Built-in 10000mAh polymer high-capacity battery, ultra-long and life 4. Three-stage wind regulation, can freely choose the appropriate air volume, and enjoy more comfortable cooling 5. Portable and design: carry it with you when you go out, and the waist is tailored, especially suitable for summer travel or outdoor sports. You can take it with you, such as office/park/watching various competitions/mountaineering Product name: outdoor waist fan Model: M22 Rated power: less than equal 10W Motor speed: 6500 rpm high speed Wind regulation: three strong winds Polymer battery capacity: 10000mAh Endurance: 6-15h Emergency mobile power supply: reverse