about this project 6000mAh Battery Capacity: The portable waist fan has a built-in 6000mAh high-capacity battery, which can run for up to 13 hours; it can keep you cool all day at the workplace or outdoors without worrying about power outages 3 levels of strong wind power: the personal fan has 3 levels of adjustment; different levels can be selected according to the surrounding temperature; equipped with a powerful 5100rpm motor, it provides stronger wind and airflow, taking away your body heat and keeping you cool USB charging and emergency power supply: This USB fan supports 2A fast charging and can be charged through the Type-C port; the fan has a USB output port, which can be used as a large-capacity mobile power supply; it provides you with an outdoor emergency power supply to solve the sudden failure of electronic products electrical troubles Waist Fan and Necklace Fan: This waist fan is designed with double clips and comes with a belt to hang around your waist; , you can hang the fan on your chest as a necklace fan, more portable Durable and drop-proof: the fan is made of ABS material, covered with TPU non-slip silicone shell, drop-proof and shock-proof; suitable for long-term outdoor use, such as high-altitude operations or construction sites