[Three-Speed Setting, Long Working Time]: This portable neck fan controls the wind strength with a single button, making it easy to use. The wind speed is divided into three different levels: low, medium, and high, allowing you to adjust the airflow to your liking. After a full charge, speeds 1 through 3 can last approximately 20 hours, 12 hours, and 7 hours, respectively. This ensures long battery life and extended cooling. [Four-in-One Design: A Small Fan with a Power Bank]: This portable fan can be used as a desk fan and neck fan, and also as a phone stand. A portable fan with a built-in 3000mAh power bank solves this problem. The four-in-one design is convenient for girls, boys, athletes, teenagers, and office workers. You can charge your phone while enjoying the cool air. It's definitely worth having. "Strong and Ultra-Quiet, USB Powered": This personal fan uses brushless motors and 7 fan blades, which can collect more airflow and generate a stronger breeze. It also operates more stably than other fans, allowing you to enjoy a cool and quiet ride. It's very convenient to use as it can be powered by various devices such as USB adapters and power banks. Therefore, you can consider it a desk fan or a personal fan. [Small and Foldable]: You can put it in your pocket, backpack, etc. Take it with you when shopping, camping, or hiking. [180° Rotating Fan and Portable Lightweight Design]: The small USB fan supports 180° rotation, allowing you to get airflow from different directions, maintaining cooling from any angle. The mini portable fan is about the size of your palm. With its portable, foldable design, it won't take up too much space or weight when placed in a backpack. Even in your pocket, it's a breeze to carry.