Transparent DesignFeatures a sleek, see-through construction, adding a modern touch to its functionality. Three-Speed OperationFeatures three adjustable speed settings: 5800rpm, 7700rpm, and 9300rpm, providing customized airflow up to 4.8m/s. Long-lasting BatteryEquipped with a 1200mAh rechargeable battery, offering up to 5 hours of use on the lowest setting. Integrated Hanging HookComes with a built-in hanging hook, allowing you to hang the fan on bags, tents, etc. Enjoy hands-free cooling wherever you go. Intuitive ControlsSimple one-button operation cycles through speed settings, with LED indicators for easy mode recognition. Specifications: Product model: W20 Battery capacity: 3.7V 1200mAh 18650 battery Input voltage: DC5V Charging current: 1A Working voltage: Fan first gear working voltage 5V, Fan second gear working voltage 7V, Fan third gear working voltage 9V Input power: 3.5W Battery use time: first gear use time: 5h, second gear use time: 3h, third gear use time 1.6h Motor speed: first gear: 5800rpm; second gear: 7700 rpm; third gear: 9300rpm Wind speed: first gear: 3.1m/s; second gear: 3.9m/s; third gear: 4.8m/s Charging time: about 1.5H-2H Material: PC/electronic components Package included: 1 x Fan 1 x English and Chinese User Manual