1.4 port usb hub 2.Slim size,easy for carry 3,Plug ... swapping 4.CE&ROHS 5,professional manufactures USB HUB ,4 port USB HUB Feature: 1) USB2.0 HUB with 4 port2 ... USB devices4) Extensively compatible with scanner, digital camera, digital vidicon, Optical mouse, keyboard, U disk etc.5) Single chip integrated USB ...