The structure of these fans is unique and fashionable.5 colors. 3-mode of wind speed and 1 mode of led light. German brushless DC motor,100% bare cooper to ensure the high winds and long-life. Intelligent control system, reliable performance, which is fully functional and easy operation. Using the international standard 18650 capacity lithium batteries, that can be recycled and low cost, more universal. A professional portable fan with integration of design, simple appearance and solid structure. Note: The wind is weak when fan without lithium battery installed but connect to power cable. Specifications Colors: Depend on our stock LED Indicator: Yes Battery Type: 18650 Lithium Rechargeable Battery Output air volume: 1-Speed 873 L/Min (work time about 2 hours) 2-Speed 459 L/Min (work time about 4 hours) 3-Speed 242 L/Min (work time about 8 hours) Output power: 4.5 W (Max) Battery: 18650 Lithium-ion battery Charger: Input: 100-240V AC Output: 5V 1A DC Charging time: about 4-5 hours Fan Charged Method: Micro USB Cable connect to USB Port of PC/notebook etc, or by power adapter (included)