Specification Speed Mode : 3 ranges Output power(MAX) #65306 4.5w Working time(H): 2-4-8 Battery Specification: 18650Li-ion Battery installation: removable Charging time(H) #65306 5 Size:5.1 4.1 1.5 Inch Net weight:188g Charger: input 100-240VAC output: 5V 1A DC Mini Fans Advantages : Unique structurefashionable design Small and exquisite easy to carry Ball fan wind strong and durable Digital control simple operation Machine welding stable and reliable 18650 Lithium-ion batterylasting power Battery is removable easy to replace USB connector easy to charge with any USB power outlet High efficiency and low loss. energy saving and environmental protection Package Including : 1 x Box Fan 1 x USB Cable 1 x 18650 battery