4 ports usb hub 2.0 1.Chinese factory 2.plug ... not required 3.good for promotion 4.OEM service 4 ports usb hub 2.0 Features:Expands 4 USB port ... rate,high speed(480Mbps),full speed(12Mbps)Connectible onto USB ports on any PC,notebook,palmtop,PDA,Ibook,cube,power Mac ... Mac OS 8.6 or aboveHot-swapping capabilityHi-speed downstream ports with USB a female connectorLogo printing service are availableIt is ...