W21 Portable Handheld Fan 3 Speeds Transparent High Speed Turbo Fan with Cold Compress Function - Transparent Green ??Transparent Design??Unique see-through construction adds a modern,stylish touch while allowing visibility of the internal mechanics. ??Three-Speed Cooling??Featuring three adjustable fan speeds with cooling function,offering customizable comfort for various environments and preferences. ??Dual Function??Combines both fan and cooling capabilities,with easy-to-use controls for switching between modes. ??Portable Turbo Fan??Compact and lightweight design for easy carrying,perfect for outdoor activities,travel,or office use. ??Long Battery Life??Powered by a 2000mAh rechargeable battery,providing up to 10 hours of use on the lowest setting. ??Integrated Hanging Hook??Comes with a built-in hanging hook,allowing you to hang the fan on bags,tents,etc. Enjoy hands-free cooling wherever you go. Specifications: Product model: W21 Battery capacity: 3.7V 2000 mAh 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: 4.5W Battery use time: first gear use time: 10h,second gear use time: 5h,third gear use time 3h First gear wind speed + cooling use time: 1.5h. Second gear wind speed + cooling use time 1 hour and 20 minutes. Third gear wind speed + cooling use time 1 hour and 10 minutes Motor speed: first gear: 5800rpm; second gear: 7700 rpm; third gear: 9300rpm Wind speed: first gear: 3.1m/s; second gear: 3.8m/s; third gear: 4.6m/s Charging time: about 2-3H Material: PC/hardware/electronic components Package included: 1 x Handheld Fan 1 x English and Chinese User Manual