【Three-Speed Adjustment&Long Long Working Time】: Portable Neck Fan One-key control of wind force, simple operation. The wind is divided into three different wind speeds: low / medium / high, so you can control the wind as you like.After fully charged, the 1st to 3rd gears can last for about 20 hours, 12 hours and 7 hours respectively. Long battery life, lasting cool.【4 in 1 Design small fan with Power Bank】: Handheld fan , Desktop Fan and Neck Fan as a mobile phone holder . DAVID ROCCO handheld fan with 3000mAh power bank comes to solve this problem for you. 4 in 1 design brings convenience for girls, boys, sportsmen, teenagers, office workers, and so on. You can charge your phone, simultaneously enjoy the cooling air. Worthy to own one.【Strong Wind & Ultra Quiet and USB Powered】: Personal Fan Using the brushless motor and 7 fan blades, which can gather more airflow and generate stronger wind, moreover it can work more stablely than the others, so you can enjoy a cool and quiet journey. It's extremely convenient to use as you can get power sources such as USB adapters and power banks. So you could take it as a desk fan, a personal fan.【Small and Foldable】: Folding size: 8*8*3.5cm. You can put it in your pocket, backpack, etc. Take it with you when you are out shopping, camping, or climbing.【180° Rotatable Fan and Portable Lightweight Design】: The small USB fan supports 180° rotation makes you get airflow from different directions so that it keeps you cool at any angle. Mini handheld fan is only the size of a palm. Using a portable folding design, it will not take up too much space and weight when putting it in a backpack. Even in your pocket there is a breeze.