[Three speed adjustment, long working time]: Portable neck fan controls the wind force with one button, easy to operate. The wind speed is divided into three different types: low, medium, and high, so you can control the wind speed as you like. After being fully charged, gears 1 to 3 can last for approximately 20 hours, 12 hours, and 7 hours, respectively. Long battery life and long-lasting cooling. [Four in one design for a small fan with a charging bank]: Handheld fan, desktop fan, and neck fan are used as mobile phone holders. A hand-held fan with a 3000mAh charging bank solves this problem for you. The four in one design brings convenience to girls, boys, sportsmen, teenagers, and office workers. You can charge your phone while enjoying the cool air. It's worth having one. "Strong wind and ultra quiet, USB powered": Personal fans use brushless motors and 7 fan blades, which can collect more airflow and generate stronger wind. Moreover, it can work more stably than other fans, so you can enjoy a cool and quiet journey. It is very convenient to use because you can obtain power supplies such as USB adapters and power packs. So you can think of it as a desktop fan, a personal fan. [Small and foldable]: You can put it in your pocket, backpack, etc. Take it with you when you go shopping, camping, or hiking. [180 rotatable fan and portable lightweight design]: The small USB fan supports 180 rotation, allowing you to obtain airflow from different directions, thereby maintaining cooling at any angle. The mini handheld fan is only as big as the palm of your hand. With a portable folding design, it won't take up too much space and weight when placed in a backpack. Even in your pocket is the breeze.