... electricity,camping use,PC use,Home use...et Name4-inch battery charging fanItem No.QT-U406Power1WVoltage3.7VPower cord1.2MProduct Size149* ... quiet personalized design.3.Professional USB interface with a PC, NB Power sharing.4.Variety of products to choose colors, ... office, home, travel is essential. 5. Built-in rechargeable lithium battery capacity 3.7V 600mA charging 120 minutes, the sustainable use ...