1.USB 4-ports Hub:1.1/2.0 version                              
2.USB hub powered an noexternal 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 Drivers,CD-RM drivers,Digital Cameras/Camcorder                                                                    
6.  DC power supply  5V  (DC adapter not included)