Promotional gift usb 4 port usb hub 1.ROHS,CE , FCC 2.Oem 3.Customized Package 4.High speed Promotional gift usb 4 port usb hub Specification:1. ... with scanner, digital camera,keyboard, Mouse, display, U disk,4. USB bus power Supply ,No external power supply required5. Truly ... hub works perfectly without external power, a compact, multi-voltage AC adapter (110/220V ) has been provided for the rare ...