LED Flower usb drive battery powered usb hub 1.ROHS,CE, ... 3.Customized,OEM 4.promotional price LED Flower usb drive battery powered usb hub Specification:1. USB2.0 ... display, U disk,4. USB bus power Supply ,No external power supply required5. Truly plug & play and hot swapping ... external power, a compact, multi-voltage AC adapter (110/220V ) has been provided for the rare circumstance when connecting ...