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 capacity8000mAh Li-polymer battery, small size, upgraded 2 times battery life up to 40+ hours 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 hottest weather. [Wide in