Specifications: 1. Unique structure. fashionable 2. Small and exquisite. easy to carry 3. Ball fan. wind strong and durable 4. Digital control. simple operation 5. Machine welding. stable and reliable 7. Battery is removable. easy to replace 8. USB connector. easy to charger 9. High efficiency and low loss. energy saving and environmental protection. 10. Specification: 11. Output air volume: 1-Speed 873 L/Min (work time about 2 hours) 12. 2-Speed 459 L/Min (work time about 4 hours) 13. 3-Speed 242 L/Min (work time about 8 hours) 14. Output power: 4 W (Max) 16. Charger: Input: 100-240V AC 17. Output: 5V 1A DC 18. Charging time: about 5 hours 19.Battery:NO.18650 Package includes: 1 x UniFire? Mini Cool Cooler Fan 1 x USB Charger Cable (battery not inclued)Note:the battery is 18650、not inclued in the package due to the custom policy.