1.USB 4-port hub: 1.1/2.0 version                                   
2. USB hub powered and no external adapter is required. 
3.Plug-and-play.Driver is not required                        
4.Support Window98/2000/XP/Window 7                                
5.Wide used for external storage devices.Scanners,Printers,DVD Drives,CD-RM drives,Digital Cameras/Camcorder