This portable belt fan comes with a double clip design that makes it easy to be trucked on your belt or T-shirt, which makes you feel cool from inner to outside. Equipped with an additional necklace strap and a bracket, not only can be worn around the neck, making your hands free for work but also can be a table fan when you are in the room. So, you can use this versatile mini fan for indoors, outdoors, cooking, cleaning, exercising, working, and delivering. [Long in Duration]: Built-in with a large capacity10000mAh Li-polymer battery, small size, cool body, good looks and practicality, up to 30 hours of battery life, can be used just enjoy your cooling life in the summer. This battery operated fan would be your best partner in the hot summer. [Strong in Wind]: Even though the waist hang fan is small, it's can be powerful while working, mini waist fan has 3 levels of adjustment, the max speed can be reached 5500RPM Super quiet while working, and give you the coolest experience in the